Fill in the blanks:
(a) Work is said to be done by a force only when ............... .
(b) Work done = Force x ............... .
(c) The energy of a body is its capacity to do ............... .
(d) The S.I. unit of energy is ............... .
(e) The potential energy of a body is due to its ............... and kinetic energy of a body is due to its ............... .
(f) Gravitational potential energy U = mass x force of gravity on unit mass x ............... .
(g) Kinetic energy = x mass x ............... .
(h) Power P = ............... / time taken.
(i) The S.I. unit of power is ............... .
(j) 1 H.P. = ............... W.
(a) Work is said to be done by a force only when the body moves.
(b) Work done = Force x distance moved in the direction of force.
(c) The energy of a body is its capacity to do work.
(d) The S.I. unit of energy is joule .
(e) The potential energy of a body is due to its state of rest or position and kinetic energy of a body is due to its state of motion.
(f) Gravitational potential energy U = mass x force of gravity on unit mass x vertical height.
(g) Kinetic energy = x mass x (speed)2.
(h) Power P = Work done by the body / time taken.
(i) The S.I. unit of power is watt (W).
(j) 1 H.P. = 746 W.