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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Work done = Force × ........................................ - Physics

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प्रश्न

Work done = Force × ........................................

रिक्त स्थान भरें

उत्तर

 Work done = Force ×distance moved in direction of force.

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अध्याय 4: Energy - Objective questions [पृष्ठ ७६]

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सेलिना Concise Physics [English] Class 8 ICSE
अध्याय 4 Energy
Objective questions | Q 2.02 | पृष्ठ ७६

संबंधित प्रश्न

A coolie does no work against the force of gravity while carrying a luggage on a road.


A car is running at a speed of 15 km h-1 while another similar car is moving at a speed of 45 km h-1. Find the ratio of their kinetic energies.


How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?


Each of the following statement describes a force acting. Which force is causing work to be done?


What is the work done on the earth by the gravitational force of the sun during its motion around the sun?

Can every force produce work?


A boy of mass m climbs up a staircase of vertical height h.

  1. What is the work done by the boy against the force of gravity?
  2. What would have been the work done if he uses a lift in climbing the same vertical height?

Define kinetic energy.

Is kinetic energy a scalar or a vector physical quantity?

A cricket ball is thrown up from the earth's surface. What happens to its P.E.
(a)    during the motion
(b)    at the highest point?


Can we destroy every energy associated with a body?

Write the S.I. units of power.

Define one horse power.

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


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


How much energy is gained by a box of mass 20 kg when a man, runs carrying the box with a speed of 3 m/s-1 to catch the bus?


A coolie, with a load of 30 kg on his head, walks on the platform. If he walks a distance of 60 m, what is the work done by him?


Define Translational motion.


A proton is kept at rest. A positively charged particle is released from rest at a distance d in its field. Consider two experiments; one in which the charged particle is also a proton and in another, a positron. In the same time t, the work done on the two moving charged particles is ______.


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