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

Answer: (a) does not change

Potential energy is the product of height, mass and gravity. Hence height is a factor in determining potential energy. Here the height does not change hence potential energy of the car does not change.

Potential energy

Potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors. The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is:

W = = m×g×h

Where,

  • m is the mass in kilograms
  • g is the acceleration due to gravity
  • h is the height in meters

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