- #1
tomgackle
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Hi there, I'm studying for mechanics final and I came across a question I can't figure out how to do. The question is as follows:
A person is on a sled of mass 10 kg that’s moving to the right on a frictionless surface at 4 m/s. Just before the sled goes down a hill the person of mass 50 kg jumps off the sled with a speed of 3 m/s relative to the sled, to the left. After the sled slides down the hill it comes in contact with a rough surface of u = 0.3 and is brought to a momentary stop by compressing a spring of force constant 1000 N/m, by 30 cm.
How far did the sled travel on the rough surface at the instant the spring was fully
compressed?
To start with, I found the change in velocity of the sled after the person jumped off, but I'm stymied as to how I can do the rest without being given the height of the hill.
any help is greatly appreciated!
thanks,
tom
A person is on a sled of mass 10 kg that’s moving to the right on a frictionless surface at 4 m/s. Just before the sled goes down a hill the person of mass 50 kg jumps off the sled with a speed of 3 m/s relative to the sled, to the left. After the sled slides down the hill it comes in contact with a rough surface of u = 0.3 and is brought to a momentary stop by compressing a spring of force constant 1000 N/m, by 30 cm.
How far did the sled travel on the rough surface at the instant the spring was fully
compressed?
To start with, I found the change in velocity of the sled after the person jumped off, but I'm stymied as to how I can do the rest without being given the height of the hill.
any help is greatly appreciated!
thanks,
tom