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प्रश्न
Name the physical quantity whose SI unit is Nm.
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उत्तर
Torque
संबंधित प्रश्न
Write an expression for the work done when a force is acting on an object in the direction of its displacement.
How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.
Name five appliances or machines which use an electric motor.
Is work done a scalar or a vector physical quantity?
Can every force produce work?
List any six forms of energy and write a short note on each of them.
A coolie is pushing a box weighing 1500 N up an inclined plane 7.5 m long on to a platform, 2.5 m above the ground.
(i) Calculate the mechanical advantage of the inclined plane. (ii) Calculate the effort applied by the coolie.
(iii) In actual practice, the coolie needs to apply more effort than what is calculated. Give one reason why you think the coolie needs to apply more effort.
