Question 347: Centre of Mass and Rotational Motion

Question

A molecule of mass 'm' moving with velocity 'v' makes 5 elastic collisions with a wall of container per second. The change in momentum of the wall per second in 5 collisions will be

Accepted Answer

Change in momentum in each collision is [mv $$-$$ ($$-$$ mv)] = 2mv
Hence change in momentum in 5 collisions is 5 $$	imes$$ 2 mV = 10 mV

Answer

10 mv

Answer

5 mv

Answer

$$\frac{1}{5}$$ mv

Answer

$$\frac{1}{10}$$ mv

Centre of Mass and Rotational Motion

A molecule of mass 'm' moving with velocity 'v' makes 5 elastic collisions with a wall of container per second. The change in momentum of the wall per second in 5 collisions will be

Choose the correct answer: