A truck carrying 500 kg sand was moving with a velocity `15 "ms"^(-1)`. After disposal of 200 kg sand what should be the velocity of the truck to maintain same momentum as before? (say mass of truck = 1000 kg)

Explanation

To solve the problem step by step, we will use the concept of momentum, which is defined as the product of mass and velocity. The momentum before and after the disposal of sand must be equal to maintain the same momentum.

### Step-by-Step Solution:

1. **Identify Initial Conditions:**
- Mass of the truck (M_truck) = 1000 kg
- Initial mass of sand (M_sand_initial) = 500 kg
- Initial velocity of the truck (V_initial) = 15 m/s
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