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Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be:
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- Mv newton
- 2 Mv newton
- (Mv/2) newton
- zero
Correct Option: A
| F = | = M | + v | |||
| dt | dt | dt |
∴ v is constant,
| F = v | But | - Mkg/s | ||
| dt | dt |
∴ F = vM newton.
