Find the momentum of the body of mass 10 kg having a kinetic energy 20J?
  • A. 10 kgm/s
  • B. 20 kgm/s
  • C. 1.44 kgm/s
  • D. None of these
A man of 50 kg jumps up to a height of 1.2 m. What is his potential energy at the highest point?
  • A. 50 J
  • B. 60 J
  • C. 500 J
  • D. 600 J
A truck driver pushes the acceleration to peddle and increase its speed from v to 2v on the level Road. The mass of the Truck is M. The potential energy of the truck?
  • A. does not change
  • B. PE of the truck becomes four times of the initial Potential energy
  • C. none of these
Work done by the acceleration peddle?
  • A. $1.5Mv^2$
  • B. PE of the truck becomes four times of the initial Potential energy
  • C. $Mv^2$
Which of the following does not have unit as Joule?
  • A. Work done
  • B. Kinetic energy
  • C. Potential energy
  • D. Heat
  • E. Force
Two bodies X and Y have same momentum. Mass of X is greater then mass of Y. Which of the two bodies will have higher kinetic energy?
  • A. X
  • B. Y
  • C. Both will have the same KE
An object is falling freely from the height H.After it has fallen a height $\frac{3H}{4}$, it will possess?
  • A. more potential and less kinetic energy
  • B. less potential and high kinetic energy
  • C. same potential and kinetic energy
  • D. only kinetic energy
which of these is not a vector quantity?
  • A. Potential Energy
  • B. Momentum
  • C. Force
  • D. Velocity
A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car
  • A. does not change
  • B. becomes twice to that of initial
  • C. becomes 4 times that of initial
  • D. becomes 16 times that of initial
Which one of the following is not the unit of energy?
  • A. joule
  • B. newton metre
  • C. kilowatt
  • D. kilowatt hour
The work done on an object does not depend upon the
  • A. displacement
  • B. force applied
  • C. angle between force and displacement
  • D. initial velocity of the object
The kinetic energy of a body depends
  • on its mass only
  • neither in its mass nor on its speed
  • on its speed only
  • on its mass as well as on its speed
Work and energy have different units.
  • True
  • False
As a body rolls down an inclined plane, it has
  • only kinetic energy
  • neither kinetic energy and potential energy
  • only kinetic energy and potential energy
  • only potential energy
A stone tied to a string is whirled in a circle. The work done by the weight of the stone for a small displacement is zero.
  • True
  • False
A person stands for a long time. Work is done by forces operating inside his body.
  • True
  • False
A force of 10 N acts on a body towards the east. The work done by the force while the body moves through 1 m in the east-north direction (midway between east and north) is
  • \(\frac{10}{\sqrt{2}}J\)
  • \(-10J\)
  • \(-\frac{10}{\sqrt{2}}J\)
  • \(10\sqrt{2}J\)
When the speed of a particle is doubled, its kinetic energy
  • becomes half
  • remains the same
  • gets doubled
  • becomes 4 times
A body of mass 2 kg is dropped from a height of 1 m. Its kinetic energy as it reaches the ground is
  • 19.6 J
  • 19.6 N
  • 19.6 kg
  • 19.6 m
When a stone tied to a string is whirled in a circle, the work done on it by the string is
  • zero
  • negative
  • positive
  • undefined
0 h : 0 m : 1 s

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