Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
Kinetic energy of a body depends upon:
(i) Mass of the body
(ii) Speed of the body
APPEARS IN
संबंधित प्रश्न
Give reasons for the following A teacher moving around in the class is doing work but a child standing and reading a book is not doing any work.
A machine raises a load of 750 N through a height of 16 m in 5 s. calculate:
- energy spent by machine,
- power at which the machine works.
Complete the following sentences:
Kilowatt is the unit of ....... and kWh is the unit of
Name the physical quantity associated with the 'rate of doing work'.
A bullet is of mass 'm' g and is moving with a velocity 'v' m/s. Find the kinetic energy of the bullet when
(a) The mass is doubled,
(b) The velocity is tripled.
What are the advantages and disadvantages of using solar cells for producing electricity?
A man squatting on the ground gets straight up and stand. The force of reaction of ground on the man during the process is ______.
A body of mass 0.5 kg travels on straight line path with velocity v = (3x2 + 4) m/s. The net work done by the force during its displacement from x = 0 tox = 2 m is ______.
