Which of the following is not correct for the condition for work not to be done:
  • force and displacement are perpendicular to each other.
  • force and displacement are at 180 degrees with each other
  • displacement is zero, though force is non-zero
  • force is zero
There are two bodies X and Y with equal kinetic energy but different masses m and 4m respectively. The ratio of their linear momentum is-
  • 1:2
  • 4:1
  • 1:√2
  • 1:4
Which of the following is not an example of zero work?
  • The work done by the tension in the string, when a body tied with the string move along a circular path.
  • When a horse pulls a cart on a level road.
  • The work done by a coolie when he travels on a horizontal platform, with a load on his head.
  • When a person holds some amount of load but, does not move from his position.
A truck moves at a steady speed on a horizontal road. What is the work done by the road on the truck?
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  • Not defined as the truck is non- living object.
  • Negative work is done on the truck.
  • No work is done on the truck.
  • Positive work is done on the truck.
Which of the following is not a unit of energy?
  • newton metre
  • electron volt
  • joule/metre
  • kilowatt hour
Which of the following statements is false:
  • kinetic energy is positive
  • potential energy is positive
  • kinetic energy is negative
  • potential energy is negative
Raindrops fall on the earth with certain kinetic energy on the earth. From where do they get this energy?
  • Chemical Energy
  • Gravitational Potential Energy
  • Energy between molecules of water
  • Heat Energy
Time rate at which work is done by a force is
  • Power
  • Torque
  • Centrifugal Force
  • Acceleration
The projection of is given by
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  • A
  • B
  • C
  • D
For what angle between Force and Displacement will the work done be positive?
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  • A
  • B
  • C
  • D
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