Question

A man is rowing upstream by a force of 1000 N, but he is still at the same position with
respect to shore. The water is running at a speed of 20 ms. The power exerted by him is?​

Answer 1

Answer:

Power, P=Force × velocity

             =1000 × 20

             =20000 W=20 kW

Answer 2

Explanation:

• force = 1000 N
• velocity = 20 m/s

We know that,

$\underline{\boxed{\sf Power = Force × Velocity}}$

$\sf \longmapsto 1000 \: N × 20 \: m/s$

$\sf \longmapsto 20000 \: Nms^{-1}$

$\sf \longmapsto 20 \: kW$