During a collision with a wall, the velocity of a 0.200-kg ball changes from 20.0 m/s toward the wall to 12.0 m/s away from the wall. If the time the ball was in contact with the wall was 60
0 ms, what was the magnitude of the average force applied to the ball? A) 40.0 N
B) 107 N
C) 16.7 N
D) 26.7 N
E) 13.3 N
B
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A solar or lunar eclipse will occur
a. when the Sun is near the line of nodes of the Moon, and the Moon is new or full. b. any time the Moon is new or full. c. when the Sun is near the solstice, and the Moon is new or full. d. half-way through an eclipse year. e. when the Sun is near the equinox, and the Moon is new or full.
What is the Kuiper belt?
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Two stones, one twice the mass of the other, are dropped from a cliff. Just before hitting the ground, what is the kinetic energy of the heavy stone compared to the light one?
a) quarter as much b) half as much c) the same d) twice as much e) four times as much
A meterstick moving in a direction parallel to its length appears to be only 60.0 cm long to an observer. What is the meterstick's speed relative to the observer? (c = 3.00 × 10^8 m/s)
a. 1.19 × 10^8 m/s c. 2.93 × 10^8 m/s b. 2.40 × 10^8 m/s d. 2.75 × 10^8 m/s