Work, Energy an...

The mass of a car is 1000 kg. How much work is required to be done on it to make it move with a speed of 36 km/h ?

A spring gun of spring constant 90 × 10²N/M is compressed by a ball of mass 16g. If the trigger is pulled, calculate the velocity of ball

The potential energy of a body is given by U = A – Bx² (where x is displacement). The magnitude of force acting on the particle is

A particle is moving under the influence of a force given by F = kx, where k is a constant and x is the distance moved. What energy (in joule) gained by the particle in moving from x = 1m to x = 3m ?

The decreases in the potential energy of a ball of mass 25 kg which falls from a height of 40 cm is

A rope-way trolly of mass 1200kg uniformly from rest to a velocity of 72 km/h in 6s. What is the average power of the engine during this period in watt ?(Neglect friction)

If the force F is applied on a body and it moves with a velocity v, the power will be

The coefficient of restitution e for a perfectly elastic collision is

Two balls at same temperature collide. What is conserved

A ball is allowed to fall from a height 20m . If there is 30% loss of energy due to impact, then after one impact ball will go up to