MEDIUM
JEE Advanced
IMPORTANT
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The displacement in meter of a particle of mass moving in one dimension under the action of a force is related to the time in second by the equation The work done by the force (in joules) in first six seconds is
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Important Questions on Work, Energy and Power
EASY
JEE Advanced
IMPORTANT
A mass is lowered with the help of a string by a distance at a constant acceleration . The work done by the string will be
EASY
JEE Advanced
IMPORTANT
A bus can be stopped by applying a retarding force when it is moving with speed on a level road. The distance covered by it before coming to rest is . If the load of the bus increases by because of passengers, for the same speed and same retarding force, the distance covered by the bus to come to rest shall be
EASY
JEE Advanced
IMPORTANT
The velocity-time graph of a particle moving in a straight line is shown in figure. The mass of the particle is . Work done by all the forces acting on the particle in time interval between to is
HARD
JEE Advanced
IMPORTANT
A pump motor is used to deliver water at a certain rate from a given pipe. To obtain times water from the same pipe in the same time, by what amount should the power of the motor be increased?
MEDIUM
JEE Advanced
IMPORTANT
The speed reached by a car of mass in travelling a distance , driven with constant power , is given by
MEDIUM
JEE Advanced
IMPORTANT
Power supplied to a particle of mass varies with time as . Here is in second. If the velocity of particle at is the velocity of particle at time will be
HARD
JEE Advanced
IMPORTANT
A body is moved along a straight line by a machine delivering a constant power. The distance moved by the body in time is proportional to
MEDIUM
JEE Advanced
IMPORTANT
A car drives along a straight level frictionless road by an engine delivering constant power. Then velocity is directly proportional to
