EOC Goal 4
Accessed 10 June 2017 at http://www.NCpublicschools.org
released January 2008

 A B C D
1. Consider this distance vs. time graph of an object.
During which intervals is the object being acted on by a force?
1. I and IV only
2. II and IV only
3. IV and V only
4. I and II only
 A B C D
2. An objectâ€™s velocity vs. time graph is shown below.
During which interval is there no net force acting on the object?
1. I
2. II
3. III
4. IV
 A B C D
3. When forces acting on an object are balanced, which characteristic of motion is zero?
1. acceleration
2. displacement
3. speed
4. velocity
 A B C D
4. A spaceship in deep space fires its engines for 3 seconds. Which describes its motion at the end of the 3 seconds when the engines are turned off?
1. It continues to accelerate.
2. It moves with a constant speed.
3. It moves with increasing speed, then the speed gradually decreases.
 A B C D
5. A 20.0-N physics textbook rests on a table. What is the force the table exerts on the textbook?
1. 0 N
2. 9.80 N
3. 20.0 N
4. 40.0 N
 A B C D
6. A sign of uniform density weighing 315 N is supported by a rigid horizontal pipe of negligible mass and a cable that makes a 50.0° angle with the wall.
What is the tension needed for the cable to support the sign?
1. 264 N
2. 365 N
3. 411 N
4. 490. N
 A B C D
7. A 20-kg mass is suspended from two ropes, as shown in the diagram below.
Which of the following relations is true?
1. T1 cos 30° = T2 cos 60°
2. T1 sin 30° = T2 sin 60°
3. T1 cos 30° = T2 sin 60°
4. T1 sin 30° = T2 cos 60°
 A B C D
8. This graph shows weight versus mass for a group of objects on planet X.
What is the acceleration due to gravity on planet X?
1. 0 m/s/s
2. 2 m/s/s
3. 6 m/s/s
4. 10 m/s/s
 A B C D
9. A 45-kg object is given a net force of 500 N. What is its acceleration?
1. 4.5 m/s2
2. 6.5 m/s2
3. 11 m/s2
4. 45 m/s2
 A B C D
10. In the drawing below, the identical inclines are frictionless and the mass of cart X is twice that of cart Y.
If the carts are allowed to roll down the inclines, which statement will be true?
1. The carts will reach the bottom of the inclines at the same time.
2. Cart Y will reach the bottom of the incline in half the time of cart X.
3. Cart Y will reach the bottom first but not in half the time of cart X.
4. Cart X will reach the bottom of the incline first.
 A B C D
11. A student is sitting at rest in a chair. How does the force that the student exerts on the chair compare to the force the chair exerts on the student?
1. the same magnitude and the same direction
2. the same magnitude but the opposite direction
3. a larger magnitude but the opposite direction
4. a smaller magnitude but the same direction
 A B C D
12. A student weighs 200. N. If he is in an elevator that is accelerating upward at 2.00 m/s/s, what will be his weight?
1. 159 N
2. 200. N
3. 241 N
4. 400. N
 A B C D
13. A physics student hits a softball with a bat. What is the force exerted on the softball by the bat?
1. equal in both size and direction to the force exerted on the bat by the softball
2. equal in size but opposite in direction to the force exerted on the bat by the softball
3. opposite in direction but much smaller than the force exerted on the bat by the softball
4. opposite in direction but much larger than the force exerted on the bat by the softball
 A B C D
14. A 46-kg rigid box is at rest on a horizontal floor. A 22-kg child sits on top of the box. A person pushes horizontally on the box with a force of 90. N. The force of static friction between the box and the floor is 230 N. What is the magnitude of the net force on the box?
1. 0 N
2. 140 N
3. 670 N
4. 990 N
 A B C D
15. The driver of a pickup truck traveling north at 20 m/s suddenly stops.
In which direction will a suitcase lying in the center of the frictionless truck bed move?
1. I
2. II
3. III
4. IV
 A B C D
16. A mass is being pushed to the right at a constant velocity.
Which vector best represents the frictional force?
1. I
2. II
3. III
4. IV
 A B C D
17. At a certain distance from the center of Earth, a satellite experiences a gravitational force, F. If the mass of the satellite was doubled and placed into the same orbit, what gravitational force would the satellite have acting on it?
1. 4F
2. 2F
3. F/2
4. F/4
 A B C D
18. The mass of the sun is 1.99 × 1030 kg . The mass of Earth is 5.97 × 1024 kg. The average distance between them is 1.50 × 1011 m . What is the gravitational attraction between Earth and the sun?
1. 5.28 × 1011 N
2. 3.52 × 1022 N
3. 5.28 × 1033 N
4. 3.52 × 1044 N