1. Two forces of 10 Newtons and 5 Newtons are applied simultaneously to an object. The maximum value of their resulting force in Newtons is

a) 5

b) 10

c) 13

d) 15

e) 35

2. Which pair of forces could produce a resultant force of 7 Newtons?

a) 2 N, 6 N

b) 3 N, 11 N

c) 1 N, 5 N

d) 4 N, 2 N

e) 3 N, 3 N

3. A 10-kg object is acted on by only two forces as illustrated below. If the object’s acceleration is 2 m/s² to the right, what is the net force on the object?

a) 0.2 N to the right

b) 0.2 N to the left

c) 2 N to the right

d) 2 N to the left

e) 20 N to the right

4. With regard to the first law of motion, if no net force is acting on an object, which of the following sentences may correctly describe the motion of the object?

I. The object will remain at rest.

II. The object will continue to move at a constant velocity.

III. The object will continue to move with a constant positive acceleration.

a) I only

b) III only

c) I and II only

d) I and III only

e) I, II, and III

5. A wooden block is pulled across a floor. The force pulling the block acts at an angle. Which of the following best represents a force diagram of the situation?

a)

b)

c) d)

e)

6. What is the weight of a 5-kg object on the surface of the Earth?

a) 5.0 kg

b) 25 N

c) 49 N

d) 49 kg

e) 98 N

7. Three forces are acting on a particle in equilibrium. The three forces are 1, 2, and 3 N. The resulting combined force of 2 N and 3 N has a magnitude of

a) 1 N

b) 2 N

c) 3 N

d) 4 N

e) 5 N

Questions 8—9 refer to the following information:

A force of 80 N directed 30° above the horizontal plane acts on a 50-N block and pulls it across a level floor through a displacement of 10 meters.

8. The work done on the block is approximately

a) 400 J.

b) 500 J.

c) 600 J.

d) 690 J.

e) 720 J.

Questions 8—9 refer to the following information:

A force of 80 N directed 30° above the horizontal plane acts on a 50-N block and pulls it across a level floor through a displacement of 10 meters.

9. The normal force between the floor and the block while the block is being pulled is approximately

a) 70 N.

b) 40 N.

c) 30 N.

d) 20 N.

e) 10 N.

10. When a net force acts upon an object, the object is

a) at rest.

b) gaining mass.

c) losing mass.

d) accelerating.

e) moving at constant velocity.

Questions 11—13 refer to the velocity vs. time graph shown below. Select the answer that most represents the physical quantity named.

11. At which point on the graph is no net force applied?

Questions 11—13 refer to the velocity vs. time graph shown below. Select the answer that most represents the physical quantity named.

12. At which point on the graph is acceleration the greatest?

Questions 11—13 refer to the velocity vs. time graph shown below. Select the answer that most represents the physical quantity named.

13. At which point on the graph does the object move the greatest distance?