NEB work Energy And Power Numericals
2075 set B Q.No. 9c A water reserviuor tank of capacity 250 cubic meter is situated at the height of 20 m from the water level . What will be the power of an electric motor to be used to fill the tank in 3 hours ? Efficency of motor is 70%
2074 set a Q.NO.9C A stationary mass explodes into two parts of mass 4 units and 40 units respectively. if the larger mass has an initial K.E 10 J , what is the initial kinetic energy of smaller mass ?
2074 set B q.no 9a An explosive of mass M place at the point explodes into one-third and two-third . if the initial K.E of smaller part is 1000 J . what will be the initial K.E of bigger part ?
2072 set D Q.No 9b you throw 20 N rock vertically into the air from the Ground Level . you observe that when it is 15 m above the Ground it is travelling at 25 m/s upward . Use work energy Theorem to Find (i) the speed as it left the ground and (ii) its maximum height
2071 set c Q.No.9a A 650 KW power engine of a vechicle of mass 1.5 *10^5 kg is rising on an inclined plane . if inclination 1 in 100 , with a constant speed of 60 km/hr . Find the frictional between wheels of the vechicle and the plane .
2071 Set D Q.NO. 9b A stationary mass explodes into two parts of mass 4 kg and 40 kg . the initial kinetic energy of larger mass is 10 J . find the velocity of smaller mass
2070 supp (set A ) Q.no 9b A block of weight of 150 N is pulled 20 m along a horizontal surface at constant velocity . calcuate the work done by pulling force if cofficent of kinetic friction is 0.20 and the pulling force makes an angle of 60 (degree)
2070 supp set B Q.NO. 9b The constant force resisting the motion of a car of mass 1500 kg is equal to one-fifteenth of its weight , if when travelling at 48 km/hr ., the car is brought to rest in distance of 50 m by applying the breakes , find the additional retarding force due to the break. (assumed constant )and heat developed by the break
2068 Q.No 9b A stationary mass explodes into two oarts of mass 4 units and 40 units respectively . if the larger mass has an kinetic energy 100 J what is the initial kinetic energy of smaller mass ?
2069 set B Q.No 9b A 0.15 kg glider is moving to the right on a frictionless horizontal air track with a speed of 0.80 m/s . it had a head collision with a 0.300 kg glider that is moving left with the speed of 2.2 m/s . find the final velocity of each glider if collision is elastic ?
2067 Q.No .9a A typical car weighs about 1200 N . if th cofficient of rolling friction is 0.015 . what horizontal force is needed to make the car move with the constant speed of 72 km/hr .Also calcuate the power developed by the engine to maintain the speed ?
2066 Q.No .9c A car of mass 1000 kg moves at aconstant speed of 25 m/s along horizontal road where frictional force is 200 N . calcuate the power developed by the Engine ?
2061 Q.No 2b A train of mass 2*10^5 kg moves at a constant speed of 72km/hr . up a straight inclined against a frictional force of 1.28 *10^4 N . the incline is such that the train raises 1m for every 100 m travelled along incline calcuate the nessacary power developed by the train
2058 Q.NO. 2b A ball a of mass 0.1kg moving with the velocity of 6m/s collides directly with a ball B of mass 0.2 kg at rest . calcuate their common velocity if both ball move up together. if a ball have a rebound of 2m/s in opposite direction after collision what would be the velocity of B ?
2056 Q.NO .2b A ball of mass 4 kg moving with the velocity of 10m/s colides with the another body of mass 16 kg moving with 4 m/s from an opposite direction and then coalescesinto a single body . Compute the loss of energy on impact ]
2051 QNo 5 A bullet of mass 10 g is fired from a gun of mass 1kg with a velocity of
100 m/s calcuate the ratio of kinetic energy of the bullet and the gun
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