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(b) 2s
(c) going up with uniform speed
(b) 486 J
(b) 1200 litres
(a) e2 h
An object, moving with a speed of 6.25 m/s, is decelerated at a rate given By dv/dt=-2.5√v Where V is the instantaneous speed. The time taken by the object, to come to rest would be
(b) 2s
(b) 2s
See lessIf the tension in the cable supporting an elevator is equal to the weight of elevator, the elevator my be
(c) going up with uniform speed
(c) going up with uniform speed
See lessA bomb of mass 30 kg at rest explodes in to two pieces of masses 18 kg and 12 kg. The velocity of 18 kg mass is 6 ms⁻¹. The kinetic energy of the other mass is
(b) 486 J
(b) 486 J
See lessHow much water a pump of 2 KW can raise in one minute to a height of 10 m? (g = 10 ms)?
(b) 1200 litres
(b) 1200 litres
See lessA ball is dropped from height ‘h’ on the ground where co-efficient of restitution is ‘e’. After one bounce the maximum height is
(a) e2 h
(a) e2 h
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