First slide

Power

Question

A vehicle needs an engine of 7500 watt to keep it moving with a constant velocity of 20 m/sec on a horizontal surface. The force resisting the motion is :

Easy

A

375 dyne
B

375 newton
C

150000 dyne
D

150000 newton

Solution

Since the vehicle moves with constant velocity, its engine power is consumed completely to overcome forces resisting the vehicle's motion.
Hence, $Fv = P \Rightarrow F = \frac{P}{v} = \frac{7500}{20} = 375 N$ .

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App