Question

List some examples of objects possess Kinetic energy.
12. How would confirm that a colourless liquid given to you is p
V. Answer the following long answer questions
13. Derive the formula for kinetic energy i.e. K.E. = my2
2
Calculate K.E. of a body of mass 2kg moving with velocity 4n
14. Explain the following with examples,​

Answer 1

Answer:

12) The boiling point and freezing point of the given liquid comes out to be 100°C or 373 K and 0°C or 273 K respectively under one atmospheric pressure, it confirms that the given liquid is pure water.

13) (This answer is given above)

14) The formula for calculating kinetic energy is :

Kinetic energy =12mv2

Here, Mass, m = 2 kg

And, Velocity, v = 0.1 m/s

So, putting these values in the above formula, we get :

Kinetic energy =12×2×(0.1)2

=12×2×0.1×0.1

= 0.01 J

Thus, the kinetic energy of the body is 0.01 joule.