Questions
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 :
a
375 dyne
b
375 newton
c
150000 dyne
d
150000 newton
detailed solution
Correct option is B
Since the vehicle moves with constant velocity, its engine power is consumed completely to overcome forces resisting the vehicle's motion.Hence, Fv=P ⇒ F=Pv=750020=375 N.Talk to our academic expert!
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