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A softball is thrown straight up, reaching a maximum height of 20 meters. Neglecting air resistance, what is the ball's approximate vertical speed when it hits the ground?
47 m
20 m/s
120 m
2 s
4.9 m
2.9 s
44.1 m
7.4 m/s
A ball is thrown straight downward with a speed of 0.50 meter per second from a height of 4.0 meters. What is the speed of the ball 0.70 second after it is released? Neglect friction.
47 m
20 m/s
120 m
2 s
4.9 m
2.9 s
44.1 m
7.4 m/s
After a model rocket reached its maximum height, it then took 5.0 seconds to return to the launch site. What is the approximate maximum height reached by the rocket? Neglect air resistance.
47 m
20 m/s
120 m
2 s
4.9 m
2.9 s
44.1 m
7.4 m/s
A ball dropped from rest falls freely until it hits the ground with a speed of 20 meters per second. The time during which the ball is in free fall is approximately
47 m
20 m/s
120 m
2 s
4.9 m
2.9 s
44.1 m
7.4 m/s
A 1.0-kilogram ball is dropped from the roof of a building 40. meters tall. What is the approximate time of fall? Neglect air resistance.
47 m
20 m/s
120 m
2 s
4.9 m
2.9 s
44.1 m
7.4 m/s
A ball is thrown vertically upward with an initial velocity of 29.4 meters per second. What is the maximum height reached by the ball? Neglect friction.
47 m
20 m/s
120 m
2 s
4.9 m
2.9 s
44.1 m
7.4 m/s
A baseball dropped from the roof of a tall building takes 3.1 seconds to hit the ground. How tall is the building? Neglect friction.
47 m
20 m/s
120 m
2 s
4.9 m
2.9 s
44.1 m
7.4 m/s
A 25-newton weight falls freely from rest from the roof of a building. What is the total distance the weight falls in the first 1.0 second?
47 m
20 m/s
120 m
2 s
4.9 m
2.9 s
44.1 m
7.4 m/s
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