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AP Physics 2021- UT Quest #3
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Gravity
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A stone is thrown straight upward and at the top of its trajectory its velocity is momentarily zero. What is its acceleration at this point?
9.8 m/s^2 down
A basketball played achieves a hang time, the total time of flight, of 0.784s when dunking the ball. What vertical height will he attain? The acceleration of gravity is 9.8 m/s^2.
.75295358896255
HINT: delta x= V0t+1/2at^2
A ball is released from rest and falls a distance h under the influence of gravity. What is its average speed during the fall?
sqrt1/2gh
A little boy is standing at the edge of a cliff 1000m high. He throws a ball straight downward at an initial speed of 20 m/s, and it falls straight to the ground below. At a time of 6 seconds after it was thrown, how far has the ball fallen? The acceleration due to gravity is 10 m/s^2.
300m
HINT: speed=velocity
Consider drops of water that fall from a dripping faucet. As drops fall they-
get further apart
A bullet is fired straight down from the top of a high cliff. What is the acceleration of the bullet? (PART ONE)
Equal to 9.8 m/s^2
What conclusion can be reached about the speed of the bullet? (PART TWO)
Always faster than its initial speed
A bullet is fired straight up from a gun with a muzzle velocity of 294 m/s. Neglecting air resistance, what will be its displacement after 7.5s? The acceleration due to gravity is 9.8 m/s^2.
1929.38m
HINT: x= (-4.9)^2 + vt
An object is thrown upward from the origin along the positive y direction and caught, Which graph correctly describes the y coordinate of the vertical motion while the object is in the air?
starts at the origin, completely positive, goes up until it reaches about mid graph to fall downward steadily till y=0
A heavy object and a light object are dropped at the same time from rest in a vacuum. The heavier object reaches the ground-
at the same time as the lighter object
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