Department of Physics and Applied Physics 95.141, S2010, Lecture 23
... a) (10 pts) What is the spring constant k of the spring? b) (10 pts) A 50g bullet is shot at 100m/s from below into the mass, and ends embedded in the mass. What is the velocity of the mass/bullet after the ...
... a) (10 pts) What is the spring constant k of the spring? b) (10 pts) A 50g bullet is shot at 100m/s from below into the mass, and ends embedded in the mass. What is the velocity of the mass/bullet after the ...
MOMENTUM!
... A 1.3 kg ball is coming straight at a 75 kg soccer player at 13 m/s who kicks it in the exact opposite direction at 22 m/s with an average force of 1200 N. How long are his foot and the ball in contact? answer: We’ll use Fnet t = p. Since the ball changes direction, p = m v = m (vf - v0) = 1.3 [2 ...
... A 1.3 kg ball is coming straight at a 75 kg soccer player at 13 m/s who kicks it in the exact opposite direction at 22 m/s with an average force of 1200 N. How long are his foot and the ball in contact? answer: We’ll use Fnet t = p. Since the ball changes direction, p = m v = m (vf - v0) = 1.3 [2 ...
SECOND MIDTERM -- REVIEW PROBLEMS
... Calculate the magnitude of F such that the block moves with a constant acceleration down the plane of 1.25 m/s 2. Use the next page with this sam e problem number for that calculation. A rock is dropped from rest on the moon. Calculate its speed after it has fallen 175 m. On a small planet a rock, w ...
... Calculate the magnitude of F such that the block moves with a constant acceleration down the plane of 1.25 m/s 2. Use the next page with this sam e problem number for that calculation. A rock is dropped from rest on the moon. Calculate its speed after it has fallen 175 m. On a small planet a rock, w ...
force and acceleration
... Mass is a measure of the amount of matter in an object. As already mentioned, mass depends on the number and kinds of atoms in the object. Weight, however, depends on gravity. You would weigh less on the Moon, for example, than you do on Earth. Why? The Moon's gravity is weaker than Earth's, so you ...
... Mass is a measure of the amount of matter in an object. As already mentioned, mass depends on the number and kinds of atoms in the object. Weight, however, depends on gravity. You would weigh less on the Moon, for example, than you do on Earth. Why? The Moon's gravity is weaker than Earth's, so you ...
Revision of Mechanics Basics
... The equation F=ma is equivalent to the equation T=I α. When a body of mass m (kg) is subjected to a Force F (N) it is accelerated by acceleration a (m/s2). Similarly, 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 ...
... The equation F=ma is equivalent to the equation T=I α. When a body of mass m (kg) is subjected to a Force F (N) it is accelerated by acceleration a (m/s2). Similarly, 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 ...
Document
... A large truck has more momentum than a car moving at the same speed because it has a greater mass. Which is more difficult to slow down? The car or the large truck? ...
... A large truck has more momentum than a car moving at the same speed because it has a greater mass. Which is more difficult to slow down? The car or the large truck? ...
AP Test Free Response Questions
... 1997B1. A 0.20 kg object moves along a straight line. The net force acting on the object varies with the object's displacement as shown in the graph above. The object starts from rest at displacement x = 0 and time t = 0 and is displaced a distance of 20 m. Determine each of the following. a. The a ...
... 1997B1. A 0.20 kg object moves along a straight line. The net force acting on the object varies with the object's displacement as shown in the graph above. The object starts from rest at displacement x = 0 and time t = 0 and is displaced a distance of 20 m. Determine each of the following. a. The a ...
1443-501 Spring 2002 Lecture #3
... Magnitude of torque is defined as the product of the force exerted on the object to rotate it and the moment arm. When there are more than one force being exerted on certain points of the object, one can sum up the torque generated by each force vectorially. The convention for sign of the torque is ...
... Magnitude of torque is defined as the product of the force exerted on the object to rotate it and the moment arm. When there are more than one force being exerted on certain points of the object, one can sum up the torque generated by each force vectorially. The convention for sign of the torque is ...
(Springs) Scripted - UTeach Outreach
... To measure the displacement of a spring, first the length of the spring in its relaxed position must be measured. After attaching an object to a spring, the spring’s length will change. The displacement of the spring is the relaxed length of the spring minus the new length. The measurement of mass t ...
... To measure the displacement of a spring, first the length of the spring in its relaxed position must be measured. After attaching an object to a spring, the spring’s length will change. The displacement of the spring is the relaxed length of the spring minus the new length. The measurement of mass t ...
Name: AP C: Impulse and Momentum 2000M1. A motion sensor and
... 1994M1. A 2-kilogram block and an 8-kilogram block are both attached to an ideal spring ( for which k = 200 N/m) and both are initially at rest on a horizontal frictionless surface, as shown in the diagram above. In an initial experiment, a 100-gram (0.1 kg) ball of clay is thrown at the 2-kilogram ...
... 1994M1. A 2-kilogram block and an 8-kilogram block are both attached to an ideal spring ( for which k = 200 N/m) and both are initially at rest on a horizontal frictionless surface, as shown in the diagram above. In an initial experiment, a 100-gram (0.1 kg) ball of clay is thrown at the 2-kilogram ...
Momentum - eAcademy
... collision. The lighter cart bounces back with a high speed and the heavier cart moves opposite the light cart at a low speed. Repeat but slide the heavier cart toward the lighter cart which is at rest. Observe the motion of the carts before, during, and after the elastic collision. The heavier cart ...
... collision. The lighter cart bounces back with a high speed and the heavier cart moves opposite the light cart at a low speed. Repeat but slide the heavier cart toward the lighter cart which is at rest. Observe the motion of the carts before, during, and after the elastic collision. The heavier cart ...
You have the momentum
... How long the force acts upon an object is important. Brief time, brief force small change Same force over an extended period of time greater change ...
... How long the force acts upon an object is important. Brief time, brief force small change Same force over an extended period of time greater change ...
Center of mass
In physics, the center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero or the point where if a force is applied causes it to move in direction of force without rotation. The distribution of mass is balanced around the center of mass and the average of the weighted position coordinates of the distributed mass defines its coordinates. Calculations in mechanics are often simplified when formulated with respect to the center of mass.In the case of a single rigid body, the center of mass is fixed in relation to the body, and if the body has uniform density, it will be located at the centroid. The center of mass may be located outside the physical body, as is sometimes the case for hollow or open-shaped objects, such as a horseshoe. In the case of a distribution of separate bodies, such as the planets of the Solar System, the center of mass may not correspond to the position of any individual member of the system.The center of mass is a useful reference point for calculations in mechanics that involve masses distributed in space, such as the linear and angular momentum of planetary bodies and rigid body dynamics. In orbital mechanics, the equations of motion of planets are formulated as point masses located at the centers of mass. The center of mass frame is an inertial frame in which the center of mass of a system is at rest with respect to the origin of the coordinate system.