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- 1. Multiple ChoiceWhat is the distance a ball falls after 1,2,3,4,5 seconds (assume g is rounded to 10 m/s2)?10, 20, 30, 40, 50 m (meters)5, 20, 45, 80,125 m (meters)5, 10,15, 20, 25 m (meters)10, 25, 60, 90,120 m (meters)
- 2. Multiple ChoiceWhat is the velocity of a ball that has been dropped off a cliff after 1 , 2, 3, 4, and 5 seconds? (assume g is rounded to 10 m/s2)?.10, 20, 30, 40, 50 m/s5, 10, 15, 20, 25 m/s5, 20, 45, 80,125 m10,10,10,10,10 m/s
- 3. Multiple ChoiceWhat is the acceleration of a ball that is dropped off the side of a cliff after 1,2,3,4,5 seconds? (assume g is rounded to 10 m/s2)5,10,15, 20, 25 m/s210, 20, 30, 40, 50 m/s25, 20, 45, 80, 125 m/s210,10,10,10,10 m/s2
- 4. Multiple ChoiceA ball is thrown upward in the air with an initial velocity of 40 m/s. How long does it take to reach back to the point it was thrown from?4 seconds2 seconds6 seconds8 seconds
- 5. Multiple ChoiceA ball is thrown up in the air with an initial velocity of 40 m/s. What is the ball's velocity after 2 seconds?0 m/s20 m/s traveling upward20 m/s traveling downward40 m/s traveling downward
- 6. Multiple ChoiceA ball is thrown up in the air with an initial velocity of 40 m/s. What is the ball's velocity after 6 seconds?20 m/s traveling upward.10 m/s traveling downward.20 m/s traveling downward.30 m/s traveling downward.
- 7. Multiple ChoiceIn free fall, where does an object have the slowest speed?ViVfVtopMore than one is correct
- 8. Multiple ChoiceWhat is terminal velocity?The highest speed an object reaches because of unbalanced forcesThe highest speed an object reaches because air resistance offsets gravity in the real worldWhen an object reaches its final velocity of zeroOnly happens in physics world
- 9. Multiple ChoiceIf a free falling object takes 10s to travel upward, what is the total time the object is in the air?0s because of symmetry and Tup = +10s, so Tdown = -10s. Which means that Ttotal = 0s.20s because of symmetry and Tup = 10s, so Tdown = 10s. Which means that Ttotal = 20s.Greater than 10s, but less than 20s because the object would fall faster than it rose because of gravity. Without more information, you cannot calculate this number.Less than 10s because the object begins falling back before the 10s and it falls faster than it rises.
- 10. Multiple ChoiceIf you know the time an object is in the air, can you find the Vf of the object?Yes, you would have to halve the time since the Ttotal is for both rise and fall and you would have to calculate the height the object rose before finding the VfYes, you would use the time the object was in the air to find the distance the object travels upward beforeNo, you are not given enough informationNo, it depends on the acceleration, which is different on the way up and on the way down.
- 11. Multiple ChoiceHow does the Vi compare to the Vf in a free fall problem?Vi and Vf are exactly the same, this is because of symmetryVi and Vf are close but Vf is larger because you would fall faster than you would rise, since you are slowing downVi and Vf are the same in magnitude, but different in vectorSince the object must start at 0m/s and end at 0m/s, Vi and Vf are the same
- 12. Multiple ChoiceThe change in velocity in a given time period is?ViVfad
- 13. Multiple ChoiceWhen speed and direction remain the same throughout a motion, this is called?Accelerated motionConstant motionChanging motionChanging velocity
- 14. Multiple ChoiceWhen the velocity of an object does not change, what happens to its acceleration?Nothing, it does accelerateIt is a constant accelerationIt is a changing acceleration
- 15. Multiple ChoiceWhen an object falls in physics world, what happens?It accelerates at a constant rate until it hits the groundIt accelerates at a non-constant rate until it hits the groundIt accelerates at a constant rate until it reaches terminal velocityIt accelerates at a non-constant rate until it reaches terminal velocity
- 16. Multiple ChoiceWhich of the following statements applies to the motion of a ball rising and then falling in free fall?
I. The ball has constant acceleration as it moves upward.
II. The ball has constant acceleration at the top of its path.
III. The ball has constant acceleration as it moves downward.I onlyIII onlyI and IIII, II, and III - 17. Multiple ChoiceA baseball catcher throws a ball vertically upward and catches it in the same spot as it returns to the mitt. At what point in the ball’s path does it experience zero velocity and nonzero acceleration at the same time?midway on the way upat the top of its paththe instant it leaves the catcher’s handthe instant before it arrives in the catcher’s mitt
- 18. Multiple ChoiceWhich would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?the featherthe metal boltThey would hit the ground at the same time.They would be suspended in a vacuum.
- 19. Multiple ChoiceWhich would fall with greater acceleration in a vacuum—a leaf or a stone?the leafthe stoneThey would accelerate at the same rate.It is difficult to determine without more information.
- 20. Multiple ChoiceSuppose you are in a car that is going around a curve. The speedometer reads a constant 30 miles per hour. Which of the following is NOT true?You and the car are accelerating.Your acceleration is constantly changing.Your velocity is constant.Your direction is constantly changing.
- 21. Multiple ChoiceA ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would beless than the speed it had when thrown upwards.more than the speed it had when thrown upwards.the same as the speed it had when thrown upwards.
- 22. Multiple ChoiceIf a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second byabout 5 m/s.about 10 m/s.about 15 m/s.a rate that depends on its initial speed.
- 23. Multiple ChoiceA freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about6m/s30m/s60m/s300m/s
- 24. Multiple Choice1. An object free falls for 3.5 seconds. How far does it fall?120.05 m17.15 m60.03 m34.3 m
- 25. Multiple Choice1. An object free falls for 3.5 seconds. Given only this information, what equation is used to find the speed?v=gtv=d/t
- 26. Multiple Choice
If you throw a baseball straight up, what is its velocity at the highest point?9.8 m/s29.8 m/s0 m/s20 m/s - 27. Multiple ChoiceA ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would beless than the speed it had when thrown upwards.more than the speed it had when thrown upwards.the same as the speed it had when thrown upwards.
- 28. Multiple ChoiceAn object accelerates at 2 m/s2. Assuming the object starts from rest, how much time does it need to accelerate to a speed of 16 m/s?4 s8 s16 s1/16 s
- 29. Multiple ChoiceA freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about:6m/s30m/s60m/s300m/s
- 30. Multiple ChoiceA ball is thrown downward from the top of a roof with a speed of 25 m/s. After 2 s, its velocity will be (down is considered a negative direction):19.6 m/s-5.4 m/s-44.6 m/s44.6 m/s
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