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प्रश्न
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संबंधित प्रश्न
State two conditions when no work is done by a force.
What are the units of (a) work, and (b) energy?
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.
The work done by a force acting obliquely is given by the formula : W = F cos θ ✕ s. What will happen to the work done if angle θ between the direction of force and motion of the body is increased gradually? Will it increase, decrease or remain constant.
The work done on an object does not depend on ______.
What should be the characteristic of a source of energy?
(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?
