1. Force

(a) Is a vector quantity.

(b) May be different from weight.

(c) Does not always cause motion.

(d) All of the above.

2. The metric weight of a 10-lb bag of sugar is approximately?

(a) 4.45 N.

(b) 44.5 N.

(c) 445 N.

(d) None of the above.

3. Mass and weight

(a) Are the same.

(b) Are different.

(c) Do not change wherever you are.

4. According to Newton’s second law, the law of acceleration,

(a) Acceleration is equal to mass times force.

(b) Mass is equal to mass times acceleration.

(c) Force is equal to mass times acceleration.

(d) None of the above.

5. Friction

(a) Always acts parallel to the surface of contact and opposite to the direction of motion.

(b) Acts in the direction of motion.

(c) Is smaller when starting than when moving.

(d) Is an imaginary force.

6. Cite three examples of forces acting without motion being produced.

7. (a) Does a pound of feathers have more inertia than a pound of lead?

(b) Does the pound of feathers have more mass than the pound of lead?

8. How is inertia a factor in multicar pileups?