Advertisements
Advertisements
प्रश्न
Write an expression for the kinetic energy of an object.
Advertisements
उत्तर
If a body of mass m is moving with a velocity v, then its kinetic energy Ek is given by the expression,
`E_k=1/2 mv^2`
Where, m = mass of the object
v = velocity of the object
APPEARS IN
संबंधित प्रश्न
An object of mass, m is moving with a constant velocity, v. How much work should be done on the object in order to bring the object to rest?
The energy of a flying kite is kinetic energy.
A car is moving with a speed of 15 km h-1 and another identical car is moving with a speed of 30 km h-1. Compare their kinetic energy.
The kinetic energy of a body is the energy by virtue of its ______.
A truck weighing 1000 kgf changes its speed from 36 km h-1 to 72 km h-1 in 2 minutes. Calculate:
- the work done by the engine and
- its power (g = 10 m s-2)
A body of mass 60 kg has the momentum 3000 kg m s-1. Calculate:
- the kinetic energy.
- the speed of the body.
Write an expression for the kinetic energy of a body of mass m moving with a velocity v.
Find the momentum of a body of mass 100 g having a kinetic energy of 20 J.
Explain the difference between potential energy and kinetic energy.
What is energy of motion? Give examples.
