Two solid cylinderical disks have equal radii. The first disk is spinning clockwise at and the second disk is spinning counterclockwise at . The second disk has a mass three times larger than the first. If both spinning disks are combined to form one disk, they end up rotating at the same angular velocity and same direction. Find this angular velocity after combination.

A ball is thrown horizontally from the top of a high building. It has an initial velocity of and lands on the ground away from the base of the building. Assuming air resistance is negligible, which of the following changes would cause the range of this projectile to increase?

I. Increasing the initial horizontal velocity

II. Decreasing the mass of the ball

III. Throwing the ball from an identical building on the moon

A 25kg child climbs up a tree. How much work is required for him to climb up this tree to a height of three meters?

A bullet is fired at at a block of wood that is moving in the opposite direction at a speed of . The bullet passes through the block and emerges with the speed of , while the block ends up at rest.

What is the mass of the block?

A particle traveling in a straight line accelerates uniformly from rest to in and then continues at constant speed for an additional for an additional . What is the total distance traveled by the particle during the ?

An object is pushed across a rough surface with a force of 53N. The rough surface exerts a frictional force of 3.47N on the object. If the object is pushed 7.9m, how much work is done on the object?

Starting from rest, a skateboarder travels down a 25o incline that's 22m long. Using conservation of energy, calculate the skateboarder's speed when he reaches the bottom. Ignore friction.

A 25kg child climbs up a tree. How much work is required for him to climb up this tree to a height of three meters?

Two solid cylinderical disks have equal radii. The first disk is spinning clockwise at and the second disk is spinning counterclockwise at . The second disk has a mass three times larger than the first. If both spinning disks are combined to form one disk, they end up rotating at the same angular velocity and same direction. Find this angular velocity after combination.

Which of the following could be used as units of impulse?