Momentum

In what kind of collision is kinetic energy always conserved?

Elastic

A helium atom collides with another helium atom in an elastic collision. Which of the following is true?

Kinetic energy is conserved but momentum is not conserved.

In a two-body collision,

Momentum is always conserved

Two playground balls collide in an inelastic collision. Which of the following is true?

Momentum is conserved, but kinetic energy is not conserved.

Which of the following best describes the momentum of two bodies after a two-body collision if the kinetic energy of the system is conserved?

Must also be conserved

A rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s. The magnitude of the momentum of the rubber ball

Remained the same

Compared to falling on a stone floor, a wine glass may not break when it falls on a carpeted floor because the

stopping time is longer on the carpet.

Two objects with different masses collide and bounce back after an elastic collision. Before the collision, the two objects were moving at velocities equal in magnitude but opposite in direction. After the collision,

the less massive object had gained momentum. 1

The law of conservation of momentum states that

the total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the objects.

Which of the following equations can be used to directly calculate the change in an object's momentum?

Δp = FΔt