# Answer to Question #6056 in Mechanics | Relativity for sarah

Question #6056
a sled is pulled by a rope 25 degrees above horizontal. the sled has a mass of ? and the coefficent of friction is ? . the force applied to the rope is? n calculate the sleds acceleration....

enter in your own numbers into the questions marks but please tellme how i would go about solving this...i have a test tomorrow
1
Expert's answer
2012-01-20T07:22:37-0500
A sled is pulled by a rope &alpha;=25&deg; above horizontal. the sled has a mass of M and the coefficent of friction is K. The force applied to the rope is F. Calculate the sleds acceleration.

The projection of the pulling forse at horizontal direction is

Fh = F*cos(&alpha;).

Now let's use the second Newton's law:

M*a = (1-K)*Fh ==&gt; a = (1-K)*Fh/M = (1-K)*F*cos(&alpha;)/M.

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