Question

A body, acted upon by a force of 50 N is displaced through a distance 10 meter in a direction making an angle of 60° with the force. The work done by the force be

• A. 200 J
• B. 100 J
• C. 300
• D. 250 J

Answer 1

Answer: (D)

250 J

Answer 2

$W = \vec { F } \cdot \vec { S } = F S \cos \theta$

$= 50 \times 10 \times \cos 60 ^ { \circ } = 50 \times 10 \times \frac { 1 } { 2 } = 250 \mathrm {~J}$.