1. How is an object’s mass related to the force needed to accelerate the object?

1. 1. How is an object’s mass related to the force needed to accelerate the object? • Mass is not related to the force needed. • The smaller the mass, the greater the force needed. • The greater the mass, the greater the force needed. • The greater the mass, the smaller the force needed.

2. 2. Air resistance is an example of • gravity. • A noncontact force. • A net force. • Friction.

3. 3. A baby pushes on a large chair. What is the reaction force? • Friction pushes on the chair. • Friction pushes on the baby. • The chair pushes on the baby. • The chair pushes on the floor.

4. 4. The tendency of an object at rest to stay at rest is • acceleration. • Balanced forces. • Inertia. • Velocity.

5. 5. A piece of wood has a mass of 18 grams and a volume of 30 cm3. What is the density of the wood? • 0.6 g/cm3 • 7.2 g/cm3 • 12 g/ cm3 • 48 g/ cm3

6. 6. A more massive marble collides with a less massive one that is not moving. The total momentum after the collision is equal to • Zero • The original momentum of the more massive marble • The original momentum of the less massive marble • Twice the original momentum of the more massive marble.

7. 7. Newton’s second law states that to increase acceleration, you • Increase force • Decrease force • Increase mass • Increase inertia

8. 8. What units are used to measure force? • Kilograms • Meters • Newtons • seconds

9. 9. A wagon is pulled down a hill with a constant velocity. All the forces on the wagon are • Balanced • Unbalanced • increasing • decreasing

10. 10. An action force and its reaction force are • Equal in size and direction • Equal in size and opposite in direction • Different in size but in the same direction • Different in size and direction