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प्रश्न
state the unit of energy.
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उत्तर
The SI unit of work is ‘joules’ and the CGS unit is ‘erg’.
संबंधित प्रश्न
Define 1 J of work.
.A man raises a box of mass 50kg to a height of 2m in 20s, while another man raises the same box to the same height in 50s. Compare:
(i) the work done, and
(ii) the power developed by them.
A bullet of mass 0.5 kg slows down from a speed of 5 m s-1 to that of 3 m s-1. Calculate the change in kinetic energy of the ball.
If the work done by a force in moving an object through a distance of 20 cm is 24.2 J, what is the magnitude of the force?
How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?
Give two examples of couple action in our daily life.
Write an expression for the work done against gravity.
Name the physical quantity whose MKS units are kgm2s-3.
