1. Two forces are applied to a wooden box as shown below. Which statement best describes the effect these forces have on the box?

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1 1. Two forces are applied to a wooden box as shown below. Which statement best describes the effect these forces have on the box? A. The box does not move. B. The box moves to the right. C. The box moves to the left. D. The box moves straight up. 2. When the roller coaster rolls onto a flat section of track, what force would ultimately bring it to a stop if no other forces are added? A. gravity B. weight C. friction D. acceleration 3. A student pushes on an object with a force of 6 newtons and the object does not move. What f orce does the object exert on the student s hands? A. 0 N B. 3 N C. 6 N D. 12 N

2 4. 5.

3 6. Hint: Net Force = 125N 7.

4 Maureen is trying to move a heavy box by pushing it across the floor. Which of the following forces opposes the movement of the box? A. spring force B. friction force C. centripetal force D. tension force

5 10. A ball weighing 5 Newtons accelerates upward when subjected to a force, F. Which statement best describes F? A. F is an unbalanced force. B. F is the inertia of the ball. C. F is the force of gravity on the ball. DF is balanced by the force of friction All of the forces acting on a rolling ball are balanced when the ball is A. slowing down. B. bouncing. C. moving at a constant speed. D. increasing its speed.

6 A student drops a bowling ball and an apple from a third-story window. Both objects hit the ground at the same time From the experiment the student should conclude that A. the apple weighs more than the bowling ball. B. the bowling ball speeds up faster than the apple. C. more air friction is acting on the apple than on the bowling ball. D. gravity pulls on both objects, causing them to fall at the same rate..

7 13. What causes a free falling object to accelerate? A. inertia B. gravity C. initial speed D. initial direction As a meteor falls and gets closer to Earth, it encounters a resistance force. Which must occur so that the meteor overcomes the resistance force? A. The sum of the forces acting on the meteor needs to be zero. B. The forces acting on the meteor must be in the same direction. C. The force of gravity needs to be greater than the resistance force. D. The resistance force must be greater than the force being applied to the meteor Brittany pedaled her bicycle quickly on a level surface. When she stopped pedaling and coasted, the bicycle slowed and came to a stop. What happened to the energy of the moving bicycle as it coasted to a stop? A. It was transferred to heat due to friction. B. It was reabsorbed into Brittany s muscles. C. It was stored in the bicycle wheels as potential energy. D. It was transferred to the air in the form of visible light.

8 16. Brandon pushes an object on a ramp as shown in the diagram. While Brandon pushes the object and it remains in contact with the ramp, which force has the greatest effect on causing it to slow? A. the applied force B. a frictional force C. the force due to gravity D. a force of air resistance 17. A student pushes a box to slide it across the floor. Which statement explains why the box begins to move? A. The weight of the box is greater than the force of friction. B. The weight of the box is less than the force of friction. C. The applied force is greater than the force of friction. D. The applied force is less than the force of friction.

9 18. The picture shows a marble rolling down a spiral ramp. Which line shows the path the marble will take at the end of the ramp? A. A B. B C. C D. D

10 19. When riding a roller coaster, an electric motor pulls the roller coaster to the top of the first hill. What force pulls the roller coaster down the hill? A. friction B. speed C. gravity D. mass Some race cars are equipped with parachutes to help bring the car to a stop. 20. Which most likely causes the change in the velocity of the race car? A. a balanced force exerted by the parachute B. an increase in the force exerted by the car C. a net force of zero between the car and parachute D. an unbalanced force between the car and parachute

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