Question

A boy with a toy pull it with a force of 15 Newton though I spring which makes an angle of 30 degree with the horizontal so as the move it by a distance of 1 m horizontally if the string was inclind making an angle of 45 degree with the horizontal how much pull kya does he apply around the string in order to move it by same distance

Answer 1

Dear student,

The work done (w) = FScos∅ = 15 x 1 x cos 30⁰ = 15 $\sqrt{3}$ / 2 = 13 j
Now when angle is 45⁰
Then work W = FS cos 45⁰ = 13
F x 1 x 1 / $\sqrt{2}$ = 13 , now F = 18.4 N
Regards