Question

10.We want to slide a 12-kg box up a 2.5-m-long ramp inclined at

. A worker,

ignoring friction, calculates that he can do this by giving it an initial speed of 5 m/s

at the bottom and letting it go. But friction is not negligible; the box slides only 1.6

m up the ramp, stops, and slides back down.

a. Find the magnitude of the friction force acting on the crate, assuming that it is

constant.

Answer 1

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