A. Objective Questions1. Write true or false for each statement(a) A coolie does no work against the force of gravity while carrying a luggage on a road(b) The energy stored in water of a dam is the kinetic energy.(c) The energy of a flying kite is kinetic energy.(d) Work done by a boy depends on the time in which he does work.(e) Power spent by a body depends on the time for which it does work.2. Fill in the blanks:(a) Work is said to be done by a forte 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 is due to its _________ n and kinetic energy of body is due to its _________(f) Gravitational potential energy U = mass × force of gravity on unit mass × ________(g) Kinetic energy = ½ × mass × _______(h) Power P = ______ /time taken(i) The S. I. unit of power is ________(j) I.H.P. = _______Select the correct alternative (a) The S.I. unit of work is 1. second 2. metre 3. joule 4. Newton(b) No work is done by a force if the body 1. moves in direction of force 2. does not move 3. moves in opposite direction 4. none of the these(c) Two coolies A and B do some work in time 1 minute and 2 minute respectively. The power spent is 1. same by both coolies 2. is more by coolie A than by B 3. is less by coolie A than by B 4. nothing can be said.(d) The expression of power P is 1. P=mgh 2. P=P=1/223. P=F×d 4. P=F×d/t(e) 1 H.P is equal to 1. 1 W 2. 1 J 3. 746 J 4. 746 W(f) When a boy doubles his speed, his kinetic energy becomes 1. half 2. Double3. four times 4. no change(g) A boy lifts a luggage from height 2 m to 4 m. The potential energy will become1. half2. double 3. one-third 4. one-fourth​