A sphere is released and falls. Its initial acceleration reduces until it eventually begins to travel at constant terminal velocity. Which displacement-time graph best represents the motion of the sphere?
A
B
C
D
A building has 5 floors. The windows on successive floors are separated by the same vertical distance. A brick is dropped from a window on each floor at the same time. The bricks should hit the ground at:
A decreasing time intervals
B equal time intervals
C increasing time intervals
D the same time
A girl dropped a stone into an empty well. She heard the sound of the stone hitting the bottom of the well after 4 seconds. The depth of the well is about
A 20 m
B 40 m
C 80 m
D 160 m
A marble is dropped from the roof of a building and takes 3.2 s to reach the ground. The approximate height of the building is:
A 16 m
B 31 m
C 50 m
D 100 m
A ball is thrown vertically upwards with a velocity of +3.0 m.s^-1. At the maximum height, the acceleration of the ball is -
A 0 m.s^-2
B – 3.0 m.s^-2
C + 9.8 m.s^-2
D – 9.8 m.s^-2
A ball is dropped from rest from a building 35.0 m high. If air resistance is neglected the ball hits the ground with a speed of -
A 8.4 m.s^–1
B 13.1 m.s^–1
C 18.5 m.s^–1
D 26.2 m.s^–1
A bus is travelling at a speed of 9.0 m s–1. It then accelerates at a rate of 0.75 m s–2 for a time of 8.0 s. What is its final speed?
A 6.0 m.s^–1
B 15 m.s^–1
C 17 m.s^–1
D 21 m.s^–1
The acceleration of free fall on a particular planet is 8.0 m.s^–2. An object is dropped from a height and hits the surface of the planet after 1.5 s. From what height was it dropped?
A 6.0 m
B 9.0 m
C 11.0 m
D 12.0 m
A cyclist travelling at a speed of 4.2 m.s^–1 accelerates at 1.1 m.s^–2. In a time of 7.4 s the distance traveled is:
A 30 m
B 35 m
C 61 m
D 91 m
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