Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
Given, mass m = 400 kg, height = 20 m, g = 10ms-2
P.E = mgh = (400) (10) (20) = 80000 J
APPEARS IN
संबंधित प्रश्न
When do we say that work is done?
Is it possible that a force is acting on a body but still the work done is zero? Explain giving one example.
Write the formula for work done on a body when the body moves at an angle to the direction of force. Give the meaning of each symbol used.
A man carrying a suitcase in his hand is walking horizontally. What is the work done against gravity?
How fast should a boy weighting 30 kg run so that his kinetic energy is 375 joule?
List any six forms of energy and write a short note on each of them.
Give an example
Chemical energy changes to heat energy.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.
