Advertisements
Advertisements
प्रश्न
What is the work done when the object acted upon by a force remains at rest?
Advertisements
उत्तर
The work done is zero because the displacement is zero.
APPEARS IN
संबंधित प्रश्न
State two conditions when no work is done by a force.
Find the kinetic energy of a body of mass 1 kg moving with a uniform velocity of 10 m s-1.
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?
What happens to the work done when the dispacement of body is at right angles to the direction of force acting on it? Explain your answer.
A girl weighing 400 N climbs a vertical ladder. If the value of g be 10 m s−2, the work by her after climbing 2 m will be :
What is meant by a translational motion? Give one example.
No work is done by a man moving on a horizontal road while carrying a box on his head. Explain.
If an electric bulb of 100 watt is lighted for 2 hours, how much electric energy would be consumed?
What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Food grains are getting dried in the sun.
