Question

The chart show the masses and velocities of two colliding objects that stick together after a collision.

Answer 1

Answer:

• 1,500 kg.m/s

Explanation:

First, arrange the information in a table:

Object        Mass (kg)           Velocity (m/s)

  A                    200                      15

  B                     150                    - 10

After the collision, the two objects are stick together, thus you talk aobut one object and one momentum.

According to the law of convervation of momentum, the momentum after the collision is equal to the momentum before the collision.

Momentum before the collision, P₁:

          $P_1=m_{A,1}\times v_{A,1}+m_{B,1}\times v_{B,1}$

         $P_1=200kg\times 15m/s+150kg\times (-10m/s)\\\\ P_1=3000kg.m/s-1500kg.m/s=1500kg.m/s$

Momentum after the collision:

• As stated, it es equal to the momentum before the collision: 1,500 kg . m/s