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A mass of 10kg on a ramp at an angle of inclination 30 degrees to the...

A mass of 10kg on a ramp at an angle of inclination 30 degrees to the horizontal, is pulled with a force of 75N an angle of 20 degrees to the ramp What is the frictional force if it is pulled up the ramp at a constant speed? g=9.8m/s2

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Answer #1

Let, F be the frictional force, f be the pulling force.

Then, f = 75 N and m = 10kg and g = 9.8 m/s2

By the given conditions we have, F =

i.e., F =

i.e., F = -21.47694656

i.e., F -21.48

(Negative sign indicate that the pulling force is greater than the frictional force)

Therefore, the frictional force is 21.48 N

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