Motion 3 Solutions Free Fall A book of mass m falls freely from rest to the floor from the top of a desk of height h. What is the speed of the book upon striking the floor?
Motion 3 Solutions Free Fall A rock falls from rest a vertical distance of 0.72 meter to the surface of a planet in 0.63 second. The magnitude of the acceleration due to gravity on the planet is 1. 1.1 m/s2
2. 2.3 m/s2
3. 3.6 m/s2
4. 9.8 m/s2
Motion 3 Solutions Free Fall 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.] 1. 0.50 m/s
2. 7.4 m/s
3. 9.8 m/s
4. 15 m/s
Motion 3 Solutions Free Fall A rock falls from rest off a high cliff. How far has the rock fallen when its speed is 39.2 meters per second? [Neglect friction.] 1. 19.6 m 2. 44.1 m 3. 78.3 m
4. 123 m
Motion 3 Solutions Free Fall A 0.25­kilogram baseball is thrown upward with a speed of 30. meters per second. Neglecting friction, the maximum height reached by the baseball is approximately
1. 15 m 2. 46 m 3. 74 m 4. 92 m
Motion 3 Solutions Free Fall A 1.0­kilogram ball is dropped from the roof of a building 40. meters tall. What is the approximate time of fall? [Neglect air resistance.]
1. 2.9 s 2. 2.0 s 3. 4.1 s 4. 8.2 s
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Motion 3 Solutions Free Fall 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
1.
2.
3.
4.
1 s 2 s 0.5 s 10 s
Motion 3 Solutions Free Fall How far will a brick starting from rest fall freely in 3.0 seconds?
1. 15 m
2. 29 m
3. 44 m
4. 88 m
Motion 3 Solutions Free Fall A rock is thrown vertically upward with an initial speed of 8 m/s. [neglect friction]
1.
2.
3.
4.
5.
How high will the rock ascend? What is the time to reach y max?
How long is the rock in the air until it strikes the ground again [time of flight]?
What is the impact speed of the rock as it strikes the ground (same level as launch)? What kind of rock is it?