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संबंधित प्रश्न
Derive a relationship between S.I. and C.C.S. unit of work
A bullet of mass 0.5 kg slows down from a speed of 5 m s-1 to that of 3 m s-1. Calculate the change in kinetic energy of the ball.
Name the physical quantity whose SI unit is Nm.
Is the motion of moon around the earth in circular path an accelerated motion?
A weight lifted a load of 200 kgf to a height of 2.5 m in 5 s. calculate: (i) the work done, and (ii) the power developed by him. Take g= 10 N kg-1.
Give an example
Electrical energy changes of sound 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?
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.
