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संबंधित प्रश्न
State the S.I. unit of energy.
A force of 30 N acts on a body and moves it through a distance of 5 m in the direction of force. Calculate the work done by the force.
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
Determine the amount of work done when an object is displaced at an angle of 30° with respect to the direction of the applied force.
What is the ratio of SI units to CGS units of 'work'?
Complete the following sentences:
The SI unit of work is ....... and of power is .......
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.
(i) A 200g ball is thrown vertically upward with an initial velocity of 30 ms-1. Draw a velocity-time graph for the motion of ball.
(ii) How long will the ball take to reach the highest point?
(iii) What will be the kinetic energy of ball, when it returns to the starting point, neglecting the air resistance?
(iv) What will be the potential energy of ball at highest point?
