A boy pulls a toy with a force ofusing a string which makes an angle of with the horizontal so as to move the toy by a distance of horizontally. If the string was inclined to make an angle of with the horizontal, how much pull would he apply along the string in order to move it is the same distance of ?
Step 1: In the first case, given data,
Force,
The angle of displacement in the horizontal direction,
Displacement,
Step 2: Find the work done,
Step 3: In the second case, given data,
The angle of displacement in the horizontal direction,
Displacement,
Step 4: Find the force,
Hence, the required pull is .