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Erg is a bigger unit of energy than joule.

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Important Questions on Work and Energy

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Science>Physics>Work and Energy>Concept of Work
Ice is used in a cooler in order to cool its contents. Which of the following will speed up the cooling process?
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Science>Physics>Work and Energy>Concept of Work
Heat and work done by the heat was discovered by
MEDIUM
Science>Physics>Work and Energy>Concept of Work
The height of victoria's falls is 63 m. What is the difference in the temperature of water at the top and at the bottom of the fall? [Given 1 cal=4.2 J and specific heat of water =1 cal g-1 C∘-1
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Science>Physics>Work and Energy>Concept of Work
The SI unit of mechanical equivalent of heat is
HARD
Science>Physics>Work and Energy>Concept of Work

A force is applied upon a body of 40 kg then its velocity increases from 1
metre/second to 2 metre/second. Determine work done by the force.

MEDIUM
Science>Physics>Work and Energy>Concept of Work
A thin paper cup filled with water does not catch fire when placed over a flame. This is because
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Science>Physics>Work and Energy>Concept of Work
Spring constant of a spring is K = 6 ×103 N/m. Work done to stretch it 10-2 m from mean position is
MEDIUM
Science>Physics>Work and Energy>Concept of Work
Name the physical quantity which is measured in calories. How is calorie related to the SI unit of that quantity?
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Science>Physics>Work and Energy>Concept of Work
An object of 40 kg mass is moving with 5 m/s velocity. Now force is applied on the object such that its velocity increases to 10 m/s. Calculate the work done by the force.
MEDIUM
Science>Physics>Work and Energy>Concept of Work
A body is displaced by 10 m when maximum work of 200 joules is done on it. Calculate the force acting on this body.
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Science>Physics>Work and Energy>Concept of Work
The SI unit of Heat is:
MEDIUM
Science>Physics>Work and Energy>Concept of Work
Derive a relationship between SI and CGS units of work.
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Science>Physics>Work and Energy>Concept of Work
A force of 40 N acts on a body, and body moves through a distance of 2 metre at an angle of 45° in the direction of the force. The work done by the force is 
EASY
Science>Physics>Work and Energy>Concept of Work
Convert 1 kilowatt-hour into joules.
HARD
Science>Physics>Work and Energy>Concept of Work
A pump on the ground floor of a building can pump up water to fill the tank of 30 m3 in 15 min. If the tank is 40 m above the ground, and the efficiency of the pump is 30%, the power consumed by the pump is g=10 m/s2
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Science>Physics>Work and Energy>Concept of Work
What is the SI unit of work?
MEDIUM
Science>Physics>Work and Energy>Concept of Work
What should be the angle between force and displacement to get minimum work?
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Science>Physics>Work and Energy>Concept of Work
160 joule of work is done when a force of 20 N is applied on an object. Calculate the distance through which the object moves and state its direction.
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Science>Physics>Work and Energy>Concept of Work
A person of mass 50 kg climbs a tower of height 72 m. Calculate the work done. (take g=10 ms2).
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Science>Physics>Work and Energy>Concept of Work
What is the amount of work done on a body of mass 10 g moving in a circular path of radius 5 cm?