Advertisements
Advertisements
प्रश्न
A body of mass 50 kg has a momentum of 3000 kg−1 ms. Calculate:
(j) the kinetic energy of the body.
(ii) the velocity of the body.
उत्तर
(i) m = 50 kg, p = 3000 kg ms−1
p = mv
v = `"P"/"m"=3000/50` = 60 ms−1
Kinetic energy of the body =`1/2` mv2
`=1/2xx50xx(60)^2` = 25 × 3600
= 90000 J
(ii) Velocity of the body v = 60 ms−1
APPEARS IN
संबंधित प्रश्न
State the energy change in the following device while in use:
A loudspeaker
Fill in the blank
Energy possessed by a compressed spring is ______ energy.
Name five different forms of energy.
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
Name the type of energy (kinetic or potential) possessed by the following:
Water flowing in a river.
Give one example to show the conversion of potential energy to kinetic energy when put in use.
How much electric power is generated in India using the wing energy?
State the energy transformation on the following:
Electricity is obtained from nuclear energy.
Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
A ball of mass 50 g falls from a height of 2m and rebounds from the ground to 1.6 m. Find:
(i) The potential energy possessed by the ball when initially at rest.
(ii) The kinetic energy of the ball before it hits the ground.
(iii) The final potential energy of the ball.
(iv) The loss in kinetic energy of the ball on collision. (Take: g = 10N kg−1)
