(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

When an elevator starts to move down suddenly we experience 'weightlessness'. Explain.

A block of mass 20 kg is pulled up a slope (fig.12) with a constant speed by applying a force of 500 N parallel to the slope. A and B are initial and final positions of the block.
(a)    Calculate the work done by the force in moving the block from A and B.
(b)    Calculate the potential energy gained by the block.

How fast should a boy weighting 30 kg run so that his kinetic energy is 375 joule?

List any six forms of energy and write a short note on each of them.

What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.

A girl of mass 50 kg runs up a flight of 40 steps in 20 seconds. If each step in 20 cm high, calculate the power developed by the girl. (g= 10 ms^-2).

A bullet is of mass 'm' g and is moving with a velocity 'v' m/s. Find the kinetic energy of the bullet when
(a) The mass is doubled,
(b) The velocity is tripled.

Fill in the boxe to show the corresponding energy transformation.

Fill in the boxe to show the corresponding energy transformation.

Fill in the boxe to show the corresponding energy transformation.

Fill in the boxe to show the corresponding energy transformation.

Fill in the boxe to show the corresponding energy transformation.

State the energy changes which take place when Water stored in the dam is used to turn turbine in dynamo.

State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.

State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.

State the energy changes which take place when A stone dropped from the top of a cliff reaches the ground after some time.

State the energy changes which take place when A toy car with a wound spring moves on ground.