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The document contains a series of physics questions related to motion, speed, and trajectories. It includes scenarios involving the speed of an object, free fall trajectories, average speed calculations, and the effects of acceleration on velocity. Additionally, it discusses the dropping of bales of hay from an airplane and the resulting distances between them as they fall.

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swapnilkrishnapandey
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15 views1 page

Op 1

The document contains a series of physics questions related to motion, speed, and trajectories. It includes scenarios involving the speed of an object, free fall trajectories, average speed calculations, and the effects of acceleration on velocity. Additionally, it discusses the dropping of bales of hay from an airplane and the resulting distances between them as they fall.

Uploaded by

swapnilkrishnapandey
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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76. Consider the motion of an object given by the position vs. time graph shown.

For what time(s) is the speed of


the object greatest?

(A) At all times from t = 0.0 s→ t = 2.0 s (B) At time t = 3.0 s (C) At time t = 4.0 s
(D) At time t = 8.5 s

77. The free fall trajectory of an object thrown horizontally from the top of a building is shown as the dashed line in
the figure. Which sets of arrows best correspond to the directions of the velocity and of the acceleration for the
object at the point labeled P on the trajectory?

78. A toy car moves 3.0 m to the North in one second. The car then moves at 9.0 m/s due South for two seconds.
What is the average speed of the car for this three second trip?
(A) 4.0 m/s (B) 5.0 m/s (C) 6.0 m/s (D) 7 m/s

79. Two automobiles are 150 kilometers apart and traveling toward each other. One automobile is moving at 60
km/h and the other is moving at 40 km/h. In how many hours will they meet?
(A) 1.5 (B) 1.75 (C) 2.0 (D) 2.5

80. Is it possible for an object’s velocity to increase while its acceleration decreases?
(A) No, because if acceleration is decreasing the object will be slowing down
(B) No, because velocity and acceleration must always be in the same direction
(C) Yes, an example would be a falling object near the surface of the moon
(D) Yes, an example would be a falling object in the presence of air resistance

Questions 81-82
During a recent winter storm, bales of hay had to be dropped from an airplane to a herd of cattle below. Assume
the airplane flew horizontally at an altitude of 180 m with a constant velocity of 50 m/s and dropped one bale of
hay every two seconds. It is reasonable to assume that air resistance will be negligible for this situation.

81. As the bales are falling through the air, what will happen to their distance of separation?
(A) the distance of separation will increase
(B) the distance of separation will decrease
(C) the distance of separation will remain constant
(D) the distance of separation will depend on the mass of the bales

82. About how far apart from each other will the bales land on the ground?
(A) 300 m (B) 180 m (C) 100 m (D) 50 m

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