2. the product of an object’s mass and velocity is its

centripetal force.
momentum.
net force.
weight.

3. what is conserved when two objects collide in a closed system?

acceleration
momentum
speed
velocity

4. what is the momentum of a 50-kilogram ice skater gliding across the ice at a speed of 5 m/s?

10 kg • m/s
500 kg • m/s
50 kg
250 kg • m/s

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.