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To keep a particle moving with constant ...

To keep a particle moving with constant velocity on a frictionless horizontal surface an external force

A

Should act continuously

B

Should be a variable force

C

Should not act

D

Should act opposite to the direction of motion

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • A motor car needs an engine of 7500 watt to keep it moving with a constant velocity of 20 m/s on horizontal road. The force of fric­tion between the car tyres and the ground is

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