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

Name the CGS unit of work.

A boy pulls a box up to 10 m with a force of 5 kgf. Calculate the work done by him.

Calculate the amount of work done by a child carrying a bag of 20 kg when he moves a distance of 40 m in
(a) Vertical direction, and
(b) Horizontal direction

(a) Define power and name its unit.
(b) A girl weighting 50 kg climbs up 60 steps each of 20 cm height in 5 minutes. Calculate the power developed.

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.