State the quantities which possesses the following unit: kgm2/s2
A man spends 6.4kJ energy in displacing a body by 64m in the direction in which he applies force in 2.5s.Calculate :
1-the force applied
2-the power spent(in H.P.
) by the man
(a) Work is said to be done by a force only when _________
(b) Work done = Force × _________
(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 body is due to its ______
(f) Gravitational potential energy U = mass × force of gravity on unit mass × _________
(g) Kinetic energy = 12× mass ×_________
(h) Power P = ______ / time taken.
(i) The S. I. unit of power is ______
(j) 1 H.P. = ______ W