A body, resting on a rough horizontal plane required a pull of 181 N inclined at 30° to the plane just to move it. It was recorded that a push of 220 N inclined at 30° to the plane just moved the body. Estimate the weight of the body in N.

Question

A body, resting on a rough horizontal plane required a pull of 181 N inclined at 30° to the plane just to move it. It was recorded that a push of 220 N inclined at 30° to the plane just moved the body. Estimate the weight of the body in N.

1 Answer

Greg · Answer 1 · 2022-10-19T04:18:34+0000

Correct answer is (c) 1000N

For explanation I would say: For vertical equilibrium we have reaction R = W – 181sin30

horizontally,

f = 181cos30

Now considering a push of 220N

horizontally

f =220cos30

vertically

R = W + 220sin30

solving the equations we get

W = 1000N.

A body, resting on a rough horizontal plane required a pull of 181 N inclined at 30° to the plane just to move it. It was recorded that a push of 220 N inclined at 30° to the plane just moved the body. Estimate the weight of the body in N.

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