Page 1. Name: 1) If a man walks 17 meters east then 17 meters south, the magnitude of the man's displacement is A) 34 m B) 30.

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1 Name: 1) If a man walks 17 meters east then 17 meters south, the magnitude of the man's displacement is 34 m 30. m 17 m 24 m 2) The graph below represents the motion of a body that is moving with 6) Which graph best represents the motion of an object initially at rest and accelerating uniformly? Page 1 increasing speed decreasing acceleration increasing acceleration constant speed 3) The average speed of a plane was 600 kilometers per hour. How long did it take the plane to travel 120 kilometers? 0.5 hour 5 hours 0.2 hour 0.7 hour 4) A car travels between the 100.-meter and 250.-meter highway markers in 10. seconds. The average speed of the car during this interval is 35 m/s 15 m/s 25 m/s 10. m/s 7) Which pair of graphs represents the same motion? 5) The graph below represents the motion of a body moving along a straight line. According to the graph, which quantity related to the motion of the body is constant? velocity acceleration displacement speed 8) An object initially at rest accelerates at 5 meters per second 2 until it attains a speed of 30 meters per second. What distance does the object move while accelerating? 30 m 90 m 600 m 3 m

2 9) A car moving at a speed of 8.0 meters per second enters a highway and accelerates at 3.0 meters per second 2. How fast will the car be moving after it has accelerated for 56 meters? 4.0 m/s 18 m/s 20. m/s 24 m/s 10) Which is constant for a freely falling object? displacement velocity acceleration speed 11) An astronaut drops a stone near the surface of the Moon. Which graph best represents the motion of the stone as it falls toward the Moon's surface? 13) A rock is thrown horizontally from the top of a cliff at 12 meters per second. Approximately how long does it take the rock to fall 45 meters vertically? [Assume negligible air resistance.] 5.0 sec 3.0 sec 8.0 sec 1.0 sec 14) An object falls freely from rest near the surface of the Earth. What is the speed of the object when it has fallen 4.9 meters from its rest position? 96 m/s 24 m/s 4.9 m/s 9.8 m/s 15) The diagram below represents two forces acting concurrently on an object Page 2 The magnitude of the resultant force is closest to 45. N 60. N 20. N 40. N 16) A baseball bat moving at high velocity strikes a feather. If air resistance is neglected, compared to the force exerted by the bat on the feather, the force exerted by the feather on the bat will be larger smaller the same 12) A clam dropped by a sea gull takes 3.0 seconds to hit the ground. What is the sea gull's approximate height above the ground at the time the clam was dropped? 15 m 90. m 45 m 30. m 17) An object with a mass of 0.5 kilogram starts from rest and achieves a maximum speed of 20 meters per second in 0.01 second. What average unbalanced force accelerates this object? N 1,000 N 0.1 N 10 N 18) A 20-kilogram cart traveling east with a speed of 6 meters per second collides with a 30-kilogram cart traveling west. If both carts come to rest immediately after the collision, what was the speed of the westbound cart before the collision? 3 m/s 4 m/s 2 m/s 6 m/s

3 19) A 2-kilogram car and a 3-kilogram car are originally at rest on a horizontal frictionless surface as shown in the diagram below. A compressed spring is released, causing the cars to separate. The 3-kilogram car reaches a maximum speed of 2 meters per second. What is the maximum speed of the 2-kilogram car? Questions 24 through 26 refer to the following: Page 3 The diagram below represents a 1.00-kilogram object being held at rest on a frictionless incline. 1 m/s 6 m/s 3 m/s 2 m/s 20) A constant force of 2.0 newtons is used to push a 3.0-kilogram mass 4.0 meters across the floor. How much work is done on the mass? 6.0 J 8.0 J 24 J 12 J 21) A 2.2-kilogram mass is pulled by a 30.-newton force through a distance of 5.0 meters as shown in the diagram below. What amount of work is done? 330 J 66 J 11 J 150 J 22) A 10.-newton force is needed to move a 3.0-kilogram box at constant speed. How much power is needed to move the box 8.0 meters in 2.0 seconds? 40. W 12 W 15 W 20. W 24) The object is released and slides the length of the incline. When it reaches the bottom of the incline, the object's kinetic energy will be closest to 2.00 J 4.00 J 19.6 J 9.81 J 25) As the object slides down the incline, the sum of the gravitational potential energy and kinetic energy of the object will decrease increase remain the same 26) If the angle between the incline and the horizontal surface is increased, the magnitude of the force needed to hold the object at rest on the incline will remain the same decrease increase 23) A 20.-kilogram object strikes the ground with 1,960 joules of kinetic energy after falling freely from rest. How far above the ground was the object when it was released? 200 m 14 m 10. m 98 m

4 27) The graph below shows the relationship between the elongation of a spring and the force applied to the spring causing it to stretch. Questions 31 through 33 refer to the following: Page 4 The diagram below represents a simple pendulum with a 2.0-kilogram bob and a length of 10. meters. The pendulum is released from rest at position 1 and swings without friction through position 4. At position 3, its lowest point, the speed of the bob is 6.0 meters per second. What is the spring constant for this spring? N/m 2.0 N/m 50. N/m 25 N/m 28) A spring has a spring constant of 120 newtons per meter. How much potential energy is stored in the spring as it is stretched 0.20 meter? 24 J 2.4 J 4.8 J 12 J 29) As an object is raised above the Earth's surface, the gravitational potential energy of the object-earth system increases remains the same decreases 30) As the pendulum swings from position A to position B as shown in the diagram below, what is the relationship of kinetic energy to potential energy? [Neglect friction.] 31) Compared to the sum of the kinetic and potential energies of the bob at position 1, the sum of the kinetic and potential energies of the bob at position 2 is the same greater less 32) What is the potential energy of the bob at position 1 in relation to position 3? 18 joules 180 joules 36 joules 72 joules 33) At which position does the bob have its maximum kinetic energy? Questions 34 and 35 refer to the following: The diagram below represents a 2.0-kilogram mass placed on a frictionless track at point A and released from rest. Assume the gravitational potential energy of the system to be zero at point E. The kinetic energy decrease is more than the potential energy increase. The kinetic energy increase is equal to the potential energy decrease. The kinetic energy decrease is equal to the potential energy increase. The kinetic energy increase is more than the potential energy decrease.

5 34) As the mass travels along the track, the maximum height it will reach above point E will be closest to 30. m 40. m 20. m 10. m 36) What is the vertical speed of the object as it reaches the ground? [Neglect friction.] 5.0 m/s 130 m/s 29 m/s 15 m/s Page 5 35) Compared to the total mechanical energy of the system at point A, the total mechanical energy of the system at point F is the same more less Questions 36 through 38 refer to the following: An object is thrown horizontally off a cliff with an initial velocity of 5.0 meters per second. The object strikes the ground 3.0 seconds later. 37) What is the horizontal speed of the object 1.0 second after it is released? [Neglect friction.] 30. m/s 5.0 m/s 10. m/s 15 m/s 38) How far from the base of the cliff will the object strike the ground? [Neglect friction.] 44 m 9.8 m 15 m 2.9 m

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