EOY Force and Motion REVIEW

Transcription

1 Name: ate: 1. The diagram shows two bowling balls of equal mass. all is resting near the edge of a shelf. all is resting on the ground below. 2. Two workers use a ramp to help lift a box onto a dock as shown below. Use the diagram below to answer the following question. Which of these statements best describes the diagram above?. all has more kinetic energy than all.. all has more kinetic energy than all.. all has more potential energy than all.. all has more potential energy than all. espite the advantage gained by using the ramp, there is a loss of energy mainly due to. friction between the box and the ramp.. the length of the ramp.. the rope stretching when it is pulled.. two people pulling the rope. page 1

2 3. The picture below shows the different positions of a skier as she is lifted to the top of a slope and then skis down the other side. 5. The diagram below shows four positions of a ball rolling down and off a curved ramp. Which statement best explains the change in the skier s potential energy?. The skier loses potential energy as she is lifted up the slope and loses potential energy as she skis down the slope. t which position is the kinetic energy of the ball being converted into potential energy?. position 1. position 2. position 3. position 4. The skier gains potential energy as she is lifted up the slope and maintains the same potential energy as she skis down the slope.. The skier gains potential energy as she is lifted up the slope and loses potential energy as she skis down the slope. 6. The graph below shows the movement of an object at several points in time.. The skier loses potential energy as she is lifted up the slope and gains potential energy as she skis down the slope. 4. factory uses a gasoline engine to turn a pulley. Which energy transformation took place?. light energy to heat energy. chemical energy to mechanical energy What is the average speed of the object?. mechanical energy to electrical energy. electrical energy to sound energy meters 25 meters.. 2 meters 50 meters page 2

3 7. n athlete can run 9 kilometers in 1 hour. If the athlete runs at that same average speed for 30 s, how far will the athlete travel? 9. The graph below shows the distance a student walks down a hall over time. Use the information shown on the graph to answer the following question(s).. 18 kilometers. 9 kilometers. 4.5 kilometers. 3.3 kilometers uring which time interval was the student moving the fastest? The graph below shows the speed of a vehicle over time. 10. The chart below represents the change in velocity for four different trains. hange in Velocity for Four ifferent Trains How far did the vehicle travel during the first two seconds?. 0.2 m. 5 m. 10 m. 20 m Train Initial Velocity Final Velocity W X Y Z If it took 5.38 s to reach the final velocity, which train had the greatest acceleration?. W. X. Y. Z page 3

4 kg object is given a net force of 500 N. What is its acceleration? 13. car travels from to at a constant 100 km/hr m/s m/s m/s m/s 2 Which of the following changes?. speed. velocity. frame of reference. speed and velocity 12. student throws a ball to the ground and it bounces several times. 14. The picture below shows a student pulling on a rope that is attached to a wall. wall Which statement best describes the ball s movement?. The distance between bounces increases as the bounce height decreases.. The distance between bounces decreases as the bounce height decreases.. The distance between bounces decreases as the bounce height stays the same.. The distance between bounces stays the same as the bounce height increases. Which statement correctly describes the amount of force applied by the wall as the student continues to apply a 250-newton force?. The wall pulls with a force of 125 newtons against the student.. The wall pulls with a force of 250 newtons against the student.. The wall exerts twice as much force as the student.. The wall exerts no force since it is stationary. page 4

5 15. The principal s chair has wheels. It sits on her office floor next to her desk. She pulls the chair away from her desk. 17. When you are driving a car, why is braking less effective on a wet road than on a dry road?. The water reduces friction.. Kinetic energy is increased by water.. Friction increases when the brakes are wet.. Reaction time is reduced during a rainstorm. What makes the chair move?. the force of gravity on the chair. the force of her pull on the chair. friction between her hand and the chair. friction between the wheels and the floor 18. Leshawna used the same force in the same way to push on three boxes. The boxes weighed 3 kg, 5 kg, and 10 kg. Which box moved most quickly, and which moved most slowly?. The 10 kg box moved most quickly; the 3 kg. The 5 kg box moved most quickly; the 10 kg. The 10 kg box moved most quickly; the 5 kg. The 3 kg box moved most quickly; the 10 kg 16. Sir Isaac Newton stated that objects move in a straight line unless some force causes them to change their direction. This law is known as the law of. inertia.. radiation.. attraction.. perpetual motion. 19. SURFER surfer paddles out from shore in search of the perfect wave. The surfer has a weight of 500 N and the surfboard weighs 100 N. When the surfer is on a surfboard floating on calm water, what is the buoyant force pushing up on the board?. 100 Newtons. 400 Newtons. 500 Newtons. 600 Newtons page 5

6 20. Kylie is given this graph of mass and force at a certain acceleration. 21. You and a friend are moving a box in your classroom. Which conclusion can be made about the graph?. The acceleration is constant at 0.1 m/s 2.. The acceleration is constant at 5 m/s 2.. The acceleration is constant at 10 m/s 2.. The acceleration is constant at 250 m/s 2. ccording to the diagram, how will the box react to the forces acting on it?. The box will fall over. The box will stay in place.. The hox will move toward Person.. The box will move toward Person. page 6

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