A body displaced 10m under the force of 10 N . If the work done on the body is 50 J , then the angle between the force and displacement will be `…….. `

Options

A. `120^(@)`
B. `90^(@)`
C. `60^(@)`
D. None of these

Answer

C

Explanation

`W = vec(F).vec(d) = Fd cos theta `
` cos theta = W/(F.d)`
` :. K . = 0.125 J `
` :. K/k = (0.125)/(2.5)`
` :. (K-K)/K xx100 = (2.5 -0.125)/(2.5) xx100`
` = (2.375 )/(2.5) xx100`
` = 23.75 xx4`
` = 95.00 % `