final exam - PHYSICS57
... (a) What is the velocity of the dog with respect to the water if it walks towards the bow? (b) What is the velocity of the dog with respect to the water if it walks towards the stern? (c) What is the velocity of the dog with respect to the water if it walks towards the east rail, at right angles to ...
... (a) What is the velocity of the dog with respect to the water if it walks towards the bow? (b) What is the velocity of the dog with respect to the water if it walks towards the stern? (c) What is the velocity of the dog with respect to the water if it walks towards the east rail, at right angles to ...
Physics Review
... 83. The difference between speed and velocity is that velocity indicates the ____________________ of motion and speed does not. 84. Freely falling objects accelerate at 9.8 m/s2 because the force of ____________________ acts on them. 85. The acceleration of a moving object is calculated by dividing ...
... 83. The difference between speed and velocity is that velocity indicates the ____________________ of motion and speed does not. 84. Freely falling objects accelerate at 9.8 m/s2 because the force of ____________________ acts on them. 85. The acceleration of a moving object is calculated by dividing ...
Cutnell 9th problems ch 1 thru 10
... A spring is hanging down from the ceiling, and an object of mass m is attached to the free end. The object is pulled down, thereby stretching the spring, and then released. The object oscillates up and down, and the time T required for one complete up-and-down oscillation is given by the equation , ...
... A spring is hanging down from the ceiling, and an object of mass m is attached to the free end. The object is pulled down, thereby stretching the spring, and then released. The object oscillates up and down, and the time T required for one complete up-and-down oscillation is given by the equation , ...
Physics Midterm Review Multiple Choice Identify the choice that best
... 70. What is the magnitude of the resultant displacement of a dog looking for its bone in the yard if the dog first heads 57.0 north of west for 10.3 m and then turns and heads west for 4.00 m? 71. A stone is thrown at an angle of 30.0 above the horizontal from the top edge of a cliff with an init ...
... 70. What is the magnitude of the resultant displacement of a dog looking for its bone in the yard if the dog first heads 57.0 north of west for 10.3 m and then turns and heads west for 4.00 m? 71. A stone is thrown at an angle of 30.0 above the horizontal from the top edge of a cliff with an init ...
Knowledge Check (Answer Key)
... Mass: Mass is the amount of material present in an object. This dimension describes how much material makes up an object. Often, mass and weight are confused as being the same because the units used to describe them are similar. Weight is a derived unit, not a fundamental unit, and is a measurement ...
... Mass: Mass is the amount of material present in an object. This dimension describes how much material makes up an object. Often, mass and weight are confused as being the same because the units used to describe them are similar. Weight is a derived unit, not a fundamental unit, and is a measurement ...
TITLE: Mechanical Equilibrium
... no way to say with the given information ANS: A Multiple Choice 3. A tennis ball filled with lead and a regular tennis ball are dropped from the top of a tall building at the same time. Both encounter air resistance. Which reaches the ground first? a. the lead-filled tennis ball b. the regular tenni ...
... no way to say with the given information ANS: A Multiple Choice 3. A tennis ball filled with lead and a regular tennis ball are dropped from the top of a tall building at the same time. Both encounter air resistance. Which reaches the ground first? a. the lead-filled tennis ball b. the regular tenni ...
Homework Problems
... the topics” lacks a coherent story line. You are reading the first volume of the Light and Matter series of introductory physics textbooks, and as implied by its title, the story line of the series is built around light and matter: how they behave, how they are different from each other, and, at the ...
... the topics” lacks a coherent story line. You are reading the first volume of the Light and Matter series of introductory physics textbooks, and as implied by its title, the story line of the series is built around light and matter: how they behave, how they are different from each other, and, at the ...
Newton`s third law
... When two or more objects are connected by strings, pulleys, or are rigidly connected, then they no longer move independently. The constraints between their positions, velocities and accelerations can be used to ease the solving of their motion. For example in the picture below, all three types of co ...
... When two or more objects are connected by strings, pulleys, or are rigidly connected, then they no longer move independently. The constraints between their positions, velocities and accelerations can be used to ease the solving of their motion. For example in the picture below, all three types of co ...
G-force
g-force (with g from gravitational) is a measurement of the type of acceleration that causes weight. Despite the name, it is incorrect to consider g-force a fundamental force, as ""g-force"" (lower case character) is a type of acceleration that can be measured with an accelerometer. Since g-force accelerations indirectly produce weight, any g-force can be described as a ""weight per unit mass"" (see the synonym specific weight). When the g-force acceleration is produced by the surface of one object being pushed by the surface of another object, the reaction-force to this push produces an equal and opposite weight for every unit of an object's mass. The types of forces involved are transmitted through objects by interior mechanical stresses. The g-force acceleration (save for certain electromagnetic force influences) is the cause of an object's acceleration in relation to free-fall.The g-force acceleration experienced by an object is due to the vector sum of all non-gravitational and non-electromagnetic forces acting on an object's freedom to move. In practice, as noted, these are surface-contact forces between objects. Such forces cause stresses and strains on objects, since they must be transmitted from an object surface. Because of these strains, large g-forces may be destructive.Gravitation acting alone does not produce a g-force, even though g-forces are expressed in multiples of the acceleration of a standard gravity. Thus, the standard gravitational acceleration at the Earth's surface produces g-force only indirectly, as a result of resistance to it by mechanical forces. These mechanical forces actually produce the g-force acceleration on a mass. For example, the 1 g force on an object sitting on the Earth's surface is caused by mechanical force exerted in the upward direction by the ground, keeping the object from going into free-fall. The upward contact-force from the ground ensures that an object at rest on the Earth's surface is accelerating relative to the free-fall condition (Free fall is the path that the object would follow when falling freely toward the Earth's center). Stress inside the object is ensured from the fact that the ground contact forces are transmitted only from the point of contact with the ground.Objects allowed to free-fall in an inertial trajectory under the influence of gravitation-only, feel no g-force acceleration, a condition known as zero-g (which means zero g-force). This is demonstrated by the ""zero-g"" conditions inside a freely falling elevator falling toward the Earth's center (in vacuum), or (to good approximation) conditions inside a spacecraft in Earth orbit. These are examples of coordinate acceleration (a change in velocity) without a sensation of weight. The experience of no g-force (zero-g), however it is produced, is synonymous with weightlessness.In the absence of gravitational fields, or in directions at right angles to them, proper and coordinate accelerations are the same, and any coordinate acceleration must be produced by a corresponding g-force acceleration. An example here is a rocket in free space, in which simple changes in velocity are produced by the engines, and produce g-forces on the rocket and passengers.