1. If a force of 23 N is applied to an object for 0.8 s, and it changes its velocity by15.2 m/s, what could be the mass of the object?

2. The work-energy theorem states that the change in the kinetic energy of an object is equal to what?

a) The loss of the object's potential energy

b) The object's total mechanical energy minus its kinetic energy

c) The force applied to the object

d) The work done on the object

3. When does the net force on an object increase?

a) When tincreases

b) When tdecreases

c) When pdecreases

4. In an elastic collision, an object with momentum 49 kgm/s collides with another that has a momentum 23 kgm/s in the opposite direction. The first object's momentum changes to 14 kgm/s. What is the momentum of the second object after the collision?

5. A baseball player exerts a force of 115on a ball for a distance of 0.5 mas he throws it. If the ball has a mass of 0.16 kg, what is its velocity as it leaves his hand?