Advertisements
Advertisements
प्रश्न
Name the unit of physical quantity obtained by the formula `(2K)/v^2` Where K: kinetic energy, v: linear velocity
Advertisements
उत्तर
We know that kinetic energy K.E. = `1/2 mv^2`
`∴ (2K)/v^2 = 2 (1/2 mv^2)"/"v^2 = m(mass)`
Hence, the physical quantity obtained is mass and its unit is kilogram (kg)/g/any unit of mass.
APPEARS IN
संबंधित प्रश्न
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
A ball of mass M is moving with a speed v. What is its kinetic energy?
A body of mass 10 kg is moving with a velocity 20 m s-1. If the mass of the body is doubled and its velocity is halved, find:
- the initial kinetic energy, and
- the final kinetic energy.
By how much will the kinetic energy of a body increase if its speed is doubled?
What do you understand by the kinetic energy of a body?
A bullet of mass 15 g has a speed of 400 m/s. What is its kinetic energy? If the bullet strikes a thick target and is brought to rest in 2 cm, calculate the average net force acting on the bullet. What happens to the kinetic energy originally in the bullet?
The momentum of a bullet of mass 20 g fired from a gun is 10 kg.m/s. The kinetic energy of this bullet in kJ will be :
Explain the difference between potential energy and kinetic energy.
Derive the formula for the kinetic energy of an object of mass m, moving with velocity v.
Find the kinetic energy of a body of mass 5 kg moving with a uniform velocity of 10 m s-1.
