Our Dynamic Universe – Problems
... a) In which direction is the ball travelling during section OB of the graph? b) Describe the velocity of the ball as represented by section CD of the graph? (c) Describe the velocity of the ball as represented by section DE of the graph? (d) What happened to the ball at the time represented by poin ...
... a) In which direction is the ball travelling during section OB of the graph? b) Describe the velocity of the ball as represented by section CD of the graph? (c) Describe the velocity of the ball as represented by section DE of the graph? (d) What happened to the ball at the time represented by poin ...
What stride rate should I use during running? What stroke frequency
... The impact force has received a lot of attention over the years as it has been thought to be a main contributing factor to running overuse injuries. This makes sense because a typical 30 minute run will involve 2400 impacts per side (using 80 strides per minute as a typical stride rate). Each foot s ...
... The impact force has received a lot of attention over the years as it has been thought to be a main contributing factor to running overuse injuries. This makes sense because a typical 30 minute run will involve 2400 impacts per side (using 80 strides per minute as a typical stride rate). Each foot s ...
Chapter2 Laws of Motion
... together changes in response to the total force acting on the object, including gravity ...
... together changes in response to the total force acting on the object, including gravity ...
Section Review: Physics Name Test #3: Wave Theory Per/Sec
... A, is projected horizontally with a velocity of 30 meters per second due east from a height of 20 meters above level ground. At the same instant, a 20-kilogram sphere, B, is projected horizontally with a velocity of 10 meters per second due west from a height of 80 meters above ...
... A, is projected horizontally with a velocity of 30 meters per second due east from a height of 20 meters above level ground. At the same instant, a 20-kilogram sphere, B, is projected horizontally with a velocity of 10 meters per second due west from a height of 80 meters above ...
A grindstone with a radius of 0.610 m is being used to sharpen an ax
... swing down and around and just reach the vertically up position, with zero speed there. (a) How much work is done on the ball by the gravitational force from the initial point to the lowest point? (b) How much work is done on the ball by the gravitational force from the initial point to the highest ...
... swing down and around and just reach the vertically up position, with zero speed there. (a) How much work is done on the ball by the gravitational force from the initial point to the lowest point? (b) How much work is done on the ball by the gravitational force from the initial point to the highest ...
Chapter 10 Problems
... triangle about an axis through the center of mass and parallel to side h. Demonstrate that I = ICM + 4ML2/9. Figure P10.28b shows the same object in a different orientation. Demonstrate that the moment of inertia of the triangular plate, about the y axis is Ih = ICM + ML2/9. Demonstrate that the sum ...
... triangle about an axis through the center of mass and parallel to side h. Demonstrate that I = ICM + 4ML2/9. Figure P10.28b shows the same object in a different orientation. Demonstrate that the moment of inertia of the triangular plate, about the y axis is Ih = ICM + ML2/9. Demonstrate that the sum ...
Section 2
... (a) Calculate the average speed at which the lorry must travel in order to reach the ferry on time. Give your answer in km/h. (b) Due to heavy traffic the lorry has an average speed of 60 km/h for the first 100 km. Calculate how long this leg of the journey takes. (c) At what speed must the lorry tr ...
... (a) Calculate the average speed at which the lorry must travel in order to reach the ferry on time. Give your answer in km/h. (b) Due to heavy traffic the lorry has an average speed of 60 km/h for the first 100 km. Calculate how long this leg of the journey takes. (c) At what speed must the lorry tr ...
CIRCULAR MOTION - Science main page
... At the axis of the rotating platform, you have no tangential speed, but you do have rotational speed. You rotate in one place. As you move away from the center, your tangential speed increases while your rotational speed stays the same. Move out twice as far from the center, and you have twice the t ...
... At the axis of the rotating platform, you have no tangential speed, but you do have rotational speed. You rotate in one place. As you move away from the center, your tangential speed increases while your rotational speed stays the same. Move out twice as far from the center, and you have twice the t ...
Samples
... height of 20 meters. Neglecting air resistance, what is the ball's approximate vertical speed when it hits the ground? (A) 10 m/sec (C) 15 m/sec (B) 20 m/sec (D) 40 m/sec 10. Acceleration is a vector quantity that represents the timerate of change in (A) momentum (C) distance (B) velocity (D) energy ...
... height of 20 meters. Neglecting air resistance, what is the ball's approximate vertical speed when it hits the ground? (A) 10 m/sec (C) 15 m/sec (B) 20 m/sec (D) 40 m/sec 10. Acceleration is a vector quantity that represents the timerate of change in (A) momentum (C) distance (B) velocity (D) energy ...
Document
... moving object on force of kinetic friction as underlined with the research question as “How do mass, surface area and speed of moving object affect the force of kinetic friction?” Therefore, the method employed in this research has three parts: In Part A, effect of mass is investigated using 1 to 15 ...
... moving object on force of kinetic friction as underlined with the research question as “How do mass, surface area and speed of moving object affect the force of kinetic friction?” Therefore, the method employed in this research has three parts: In Part A, effect of mass is investigated using 1 to 15 ...
Example 6.1 The Conical Pendulum A small ball of mass m is
... Finalize Equation (3) shows that the banking angle is independent of the mass of the vehicle negotiating the curve. If a car rounds the curve at a speed less than 13.4 m/s, the centripetal acceleration decreases. Therefore, the normal force, which is unchanged, is sufficient to cause two acceleratio ...
... Finalize Equation (3) shows that the banking angle is independent of the mass of the vehicle negotiating the curve. If a car rounds the curve at a speed less than 13.4 m/s, the centripetal acceleration decreases. Therefore, the normal force, which is unchanged, is sufficient to cause two acceleratio ...
ODU-Mechanics-Questions
... Work done, kinetic and potential energy ........................................ 25 Section 3: Collisions and explosions .................................................... 27 ...
... Work done, kinetic and potential energy ........................................ 25 Section 3: Collisions and explosions .................................................... 27 ...
36 2.1 Describing Motion 2.2 Acceleration 2.3 Motion and Forces
... The people on these two escalators have the same speed. However, their velocities are different because they are traveling in opposite directions. ...
... The people on these two escalators have the same speed. However, their velocities are different because they are traveling in opposite directions. ...
Understanding Circular Motion
... 2.2 Investigates experimentally and solves problems that relate to time, distance, displacement, speed, velocity, and acceleration. 2.3 Resolves problems that involve motion vectors for direction and size. 3.3 Investigates experimentally and solves problems that relate gravitational forces, mass, di ...
... 2.2 Investigates experimentally and solves problems that relate to time, distance, displacement, speed, velocity, and acceleration. 2.3 Resolves problems that involve motion vectors for direction and size. 3.3 Investigates experimentally and solves problems that relate gravitational forces, mass, di ...
36 2.1 Describing Motion 2.2 Acceleration 2.3 Motion and Forces
... The people on these two escalators have the same speed. However, their velocities are different because they are traveling in opposite directions. ...
... The people on these two escalators have the same speed. However, their velocities are different because they are traveling in opposite directions. ...
A train travels from town A to town B. Figure 1 shows the route taken
... Part of a bus route is along a high street. The distance – time graph shows how far the bus travelled along the high street and how long it ...
... Part of a bus route is along a high street. The distance – time graph shows how far the bus travelled along the high street and how long it ...
Revision of Mechanics Basics
... when a body that can rotate around an axis and has a moment of inertia of I (kg m2) is subjected to a torque T (N m), its rotational speed will accelerate at a rotational acceleration ω (rad/s2). Some other notes on the table are shown below: 1. There is no clear equivalent of the potential energy o ...
... when a body that can rotate around an axis and has a moment of inertia of I (kg m2) is subjected to a torque T (N m), its rotational speed will accelerate at a rotational acceleration ω (rad/s2). Some other notes on the table are shown below: 1. There is no clear equivalent of the potential energy o ...
Slide 1
... 61. Two automobiles of weight 7.12 kN and 14.24 kN are traveling along horizontally at 96 km/h (26.7 m/s) when they both run out of gas. Luckily, there is a town in a valley not far off, but it’s just beyond a 33.5 mhigh hill. Neglect friction, which of the cars will make it to town? ...
... 61. Two automobiles of weight 7.12 kN and 14.24 kN are traveling along horizontally at 96 km/h (26.7 m/s) when they both run out of gas. Luckily, there is a town in a valley not far off, but it’s just beyond a 33.5 mhigh hill. Neglect friction, which of the cars will make it to town? ...
Chapter 2 - trinity
... a news story about a hurricane, like the one in Figure 6, that is approaching land. The storm, traveling at a speed of 20 km/h, is located 100 km east of your location. Should you be worried? Unfortunately, you don’t have enough information to figure out the answer. Knowing only the speed of the sto ...
... a news story about a hurricane, like the one in Figure 6, that is approaching land. The storm, traveling at a speed of 20 km/h, is located 100 km east of your location. Should you be worried? Unfortunately, you don’t have enough information to figure out the answer. Knowing only the speed of the sto ...
circular motion - Van Buren Public Schools
... At the axis of the rotating platform, you have no tangential speed, but you do have rotational speed. You rotate in one place. As you move away from the center, your tangential speed increases while your rotational speed stays the same. Move out twice as far from the center, and you have twice the t ...
... At the axis of the rotating platform, you have no tangential speed, but you do have rotational speed. You rotate in one place. As you move away from the center, your tangential speed increases while your rotational speed stays the same. Move out twice as far from the center, and you have twice the t ...
Rotary Homework #1
... kg, and the magnitude of the force acting on it as it settles out of the plasma is 4.0 × 10–11 N. At how many revolutions per second should the centrifuge be operated? 11. A certain light truck can go around a flat curve having a radius of 150 m with a maximum speed of 32.0 m/s. With what maximum sp ...
... kg, and the magnitude of the force acting on it as it settles out of the plasma is 4.0 × 10–11 N. At how many revolutions per second should the centrifuge be operated? 11. A certain light truck can go around a flat curve having a radius of 150 m with a maximum speed of 32.0 m/s. With what maximum sp ...
Friction, Circular Motion
... 11. (II) A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.15 and the push imparts an initial speed of 3.5 m / s? 12. (II) (a) Show that the minimum stopping distance for an automobile traveling at speed y is equal to y ...
... 11. (II) A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.15 and the push imparts an initial speed of 3.5 m / s? 12. (II) (a) Show that the minimum stopping distance for an automobile traveling at speed y is equal to y ...
Notes
... _ u_ g_h_e_r_ or by pressing the surfaces a r_ d_ e_r_ together. h_ The force of friction can be reduced by making the o t_ h_ e_r_ or lifting the surfaces away surfaces s m _ _o _ from each other. Lubrication for example, uses o i_l _ which lifts two surfaces apart and r e _d _ u_ c_e_s_ the force ...
... _ u_ g_h_e_r_ or by pressing the surfaces a r_ d_ e_r_ together. h_ The force of friction can be reduced by making the o t_ h_ e_r_ or lifting the surfaces away surfaces s m _ _o _ from each other. Lubrication for example, uses o i_l _ which lifts two surfaces apart and r e _d _ u_ c_e_s_ the force ...
Introduction to Circular Motion
... What three factors affect the weight of an object? 1. Mass 2. Mass 3. distance An increase in which of the three factors above will increase your weight the most? mass Why do you not feel the gravitational force between you and your textbook? The masses are so small compared to that of the planets. ...
... What three factors affect the weight of an object? 1. Mass 2. Mass 3. distance An increase in which of the three factors above will increase your weight the most? mass Why do you not feel the gravitational force between you and your textbook? The masses are so small compared to that of the planets. ...
77777 N. Sullivan PHYSICS DEPARTMENT PHY 2004
... (1) Code your test number on your answer sheet (use lines 76–80 on the answer sheet for the 5-digit number). Code your name on your answer sheet. DARKEN CIRCLES COMPLETELY. Code your UFID number on your answer sheet. (2) Print your name on this sheet and sign it also. (3) Do all scratch work anywher ...
... (1) Code your test number on your answer sheet (use lines 76–80 on the answer sheet for the 5-digit number). Code your name on your answer sheet. DARKEN CIRCLES COMPLETELY. Code your UFID number on your answer sheet. (2) Print your name on this sheet and sign it also. (3) Do all scratch work anywher ...
Speeds and feeds
The phrase speeds and feeds or feeds and speeds refers to two separate velocities in machine tool practice, cutting speed and feed rate. They are often considered as a pair because of their combined effect on the cutting process. Each, however, can also be considered and analyzed in its own right.Cutting speed (also called surface speed or simply speed) is the speed difference (relative velocity) between the cutting tool and the surface of the workpiece it is operating on. It is expressed in units of distance along the workpiece surface per unit of time, typically surface feet per minute (sfm) or meters per minute (m/min). Feed rate (also often styled as a solid compound, feedrate, or called simply feed) is the relative velocity at which the cutter is advanced along the workpiece; its vector is perpendicular to the vector of cutting speed. Feed rate units depend on the motion of the tool and workpiece; when the workpiece rotates (e.g., in turning and boring), the units are almost always distance per spindle revolution (inches per revolution [in/rev or ipr] or millimeters per revolution [mm/rev]). When the workpiece does not rotate (e.g., in milling), the units are typically distance per time (inches per minute [in/min or ipm] or millimeters per minute [mm/min]), although distance per revolution or per cutter tooth are also sometimes used.If variables such as cutter geometry and the rigidity of the machine tool and its tooling setup could be ideally maximized (and reduced to negligible constants), then only a lack of power (that is, kilowatts or horsepower) available to the spindle would prevent the use of the maximum possible speeds and feeds for any given workpiece material and cutter material. Of course, in reality those other variables are dynamic and not negligible; but there is still a correlation between power available and feeds and speeds employed. In practice, lack of rigidity is usually the limiting constraint.The phrases ""speeds and feeds"" or ""feeds and speeds"" have sometimes been used metaphorically to refer to the execution details of a plan, which only skilled technicians (as opposed to designers or managers) would know.