Question

A small ball of mass 10 kg is moving with speed 4m/s collides with another ball of mass 6 kg at rest. If the collision is head on then respective speeds of balls after collision will be

Answer 1

Speed of ball after collision is 6.666 kgm/s

Explanation:

Given,

$m_1$ = 10 kg

$m_2$ = 6 kg

$v_1$ = 4 m/s

$v_2$ = ?

We know that,

Total initial momentum,

$m_1\times v_1 = m_2 \times v_2$

Put the above values,

$10\times 4 = 6 \times v_2$

$v_2 = \frac{10\times 4}{6}$

$v_2 = \frac{40}{6}$

$v_2 = 6.666$ kgm/s

Speed of ball after collision is 6.666 kgm/s