A truck of mass 1000 kg moving with a speed of 72 km/hr collides with a stationary truck of the same mass . After the collision , the trucks get stick together and move . Calculate their common speed after collision . Is it elastic or ineleastic collision ?

Explanation

To solve the problem, we will use the principle of conservation of momentum. The momentum before the collision should equal the momentum after the collision since no external forces are acting on the system.

### Step 1: Convert the speed from km/hr to m/s
The speed of the moving truck is given as 72 km/hr. We need to convert this to meters per second (m/s).

\[ \text{Speed in m/s} = \frac{\text{Speed in km/hr} \times 1000}{3600} \]
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