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Matter In Our Surroundings

Question
CBSEENSC9006305
Wired Faculty App

How is work done measured when a body moves in the direction of the applied force?

Solution

Work done by a constant force when a body moves in the direction of applied force.
As shown in Fig., suppose a force F acts on a body.

Fig. Work done, when force and displacement are in same direction.
The body moves through a distance s in the direction of the force.
Work done = Force   cross times space d i s p l a c e m e n t
i.e.,    W = F.s
So, work done by a force acting on a body is equal to the magnitude of the force multiplied by the distance moved in the direction of the force. 

Some More Questions From Matter In Our Surroundings Chapter

Suggest a method to liquify atmospheric gases.

Convert the following temperatures to Kelvin scale.

35°C

Give reason for the following observations.

Naphthalene balls disappear with time without leaving any solid.

Give reason for the following observations.

We can get the smell of perfume sitting several metres away.

What is the physical state of water at

a) 25°C
b)00C
c)1000C

What is the physical state of water at
0°C

What is the physical state of water at
100°C

Give two reasons to justify
Water at room temperature is a liquid.

Give two reasons to justify
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Why is ice at 273K more effective in cooling than water at the same temperature ?

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