Unit 4: Systems of Particles and Linear Momentum

In a perfectly inelastic collision, which quantity is conserved?

A 3 kg cart moving at 4 m/s collides with and sticks to a 1 kg cart at rest. What is the final speed of the combined carts in m/s?

The momentum of a 3 kg object moving at 4 m/s is

A 2 kg ball moving at 5 m/s collides head-on with a 3 kg ball at rest. They stick together. The velocity of the combined mass after the collision is

A 0.15 kg baseball traveling at 40 m/s is hit by a bat and leaves at 50 m/s in the opposite direction. If the bat is in contact with the ball for 0.01 s, the average force on the ball is

In which type of collision is kinetic energy conserved?

Two objects of equal mass undergo an elastic head-on collision. Object A moves at 6 m/s and object B is at rest. After the collision,

A 50 kg ice skater initially at rest pushes off a 70 kg ice skater. If the 70 kg skater moves at 2 m/s, the 50 kg skater moves at

A 0.01 kg bullet traveling at 400 m/s embeds in a 2 kg wooden block on a frictionless surface. The block's velocity after impact is

A 60 kg person jumps from a 3 m/s moving cart (mass 40 kg) and lands with zero velocity. The cart's new velocity is

Two objects of masses 3 kg and 1 kg travel toward each other at 4 m/s and 6 m/s respectively. They collide and stick together. The velocity of the combined mass is

If you double the speed of an object, its kinetic energy:

A 5 kg ball falls 10 m. How much work does gravity do? (g = 10 m/s²)

A ball is thrown straight up. At the top of its trajectory:

A spring with k = 300 N/m is compressed 0.2 m. What is the potential energy stored?

A 1 kg ball is released from a height of 5 m on a frictionless ramp. What is its speed at the bottom? (g = 10 m/s²)

When friction is present on a surface, the mechanical energy of a system:

A person carries a box horizontally across a room. The work done by the gravitational force on the box is:

A system's total energy can change when:

A roller coaster car starts from rest at height h. What is the minimum height of a loop of radius r that the car can complete? (Assume no friction)