Question

Block A, with a mass of 4.0 kg, is moving with a speed of 3.0 m/s while block B, with a mass of 6.0 kg, is moving in the opposite direction with a speed of 5.0 m/s. What is the momentum of the two-block system

Answer 1

Answer:

The momentum of the two-block system is 18 kg-m/s

Explanation:

It is given that,

Mass of block A, $m_A=4\ kg$  

Mass of block B, $m_B=6\ kg$  

Velocity of block A, $v_A=3\ m/s$  

Velocity of block B, $v_B=-5\ m/s$ (it is moving in opposite direction)

We need to find the momentum of two block system. It is given by the product of mass and velocity for both blocks i.e.

$p=m_Av_A+m_Bv_B$

$p=4\ kg\times 3\ m/s+6\ kg\times (-5\ m/s)$

p = -18 kg-m/s

So, the momentum of two block system is 18 kg-m/s. Hence, this is the required solution.