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Matter In Our Surroundings

Question

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Find the energy possessed by an object of mass 10 kg when it is at a height of 6 m above the ground.
(The value of g = 9.8 ms^-2).

Solution

Given,

Mass of the object, m = 10 kg

Height of the object, h = 6 m

Acceleration due to gravity, g = 9.8 ms^-2

Potential energy of the object, E_p = mgh

= 10 x 9.8 x 6 J

= 588 J.

Some More Questions From Matter In Our Surroundings Chapter

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
An iron almirah is a solid at room temperature.

Why is ice at 273K more effective in cooling than water at the same temperature ?

What produces more severe burns, boiling water or steam ?

8. Name A, B, C, D, E and F in the following diagram showing state change :

Both boiling and evaporation convert a liquid into vapour. What is the difference between the two process

Define Evaporation

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