Question

A 2 kg ball of putty moving to the right at 3m/s has a head-on inelastic collision with a 2 kg ball of putty at rest. What is the final magnitude and direction of the velocity of the stuck together balls after the collision?

Answer 1

Answer:1.2 m/s

Explanation:

mass of ball$`(m_1)=2 kg$`

initial Velocity of $m_1=3 m/s$`

mass of another ball $(m_2)=2 kg$`

initial velocity of $m_2=0$`

Conserving momentum

$m_1u_1+m_2u_2=(m_1+m_2)v$`

$2\times 3+2\times 0=(2+3)v$`

$v=\frac{6}{5}=1.2 m/s$`