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Exam 3: Linear Motion

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Question 31

Multiple Choice

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If you drop an object,it will accelerate downward at a rate of 9.8 meters per second per second.If you instead throw it downwards,its acceleration (in the absence of air resistance) will be

A) less than 9.8 meters per second per second.
B) 9) 8 meters per second per second.
C) greater than 9.8 meters per second per second.

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Question 32

Multiple Choice

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If a car accelerates from rest at 2 meters per second per second,its speed 3 seconds later will be about

A) 2 m/s.
B) 3 m/s.
C) 4 m/s.
D) 6 m/s.

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Question 33

Multiple Choice

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Someone standing at the edge of a cliff throws one ball straight up and another ball straight down at the same initial speed.Neglecting air resistance,the ball to hit the ground below the cliff with the greater speed will be

An apple falls from a tree and hits the ground 5 meters below.It hits the ground with a speed of about

An apple falls from a tree and hits the ground 5 meters below.It hits the ground with a speed of about

While a car travels around a circular track at a constant speed,its

It takes 6 seconds for a stone to fall to the bottom of a mine shaft.How deep is the shaft?

Disregarding air resistance,objects fall with constant

The muzzle velocity of a bullet fired from a new rifle is 100 m/s.Neglecting air resistance,at the end of one second a bullet fired straight up into the air will have traveled a distance of

If a projectile is fired straight up at a speed of 10 m/s,the time it takes to reach the top of its path is about

An object at rest near the surface of a distant planet starts to fall freely.If the acceleration there is twice that of the Earth,its speed one second later would be

At one instant an object in free fall is moving downward at 50 meters per second.One second later its speed should be about

An object covers a distance of 8 meters in the first second of travel,another 8 meters during the next second,and 8 meters again during the third second.Its acceleration in meters per second per second is approximately

In each second of fall,the distance a freely falling object will fall is

If an object moves with constant acceleration,its velocity must