A 4.0 kg box slides with an initial speed of 3.0 towards a spring on a frictionless horizontal surface. S
When the box hits the spring, the spring compresses and stops the box momentarily. The spring constant
N
k= 125
m
m
w
How far does the spring compress?
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Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.