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NEET 2008
Exam
NEET
Year
2008
Subject
Physics
Chapter
Center of Mass, Momentum and Collision

NEET 2008 · Physics · Center of Mass, Momentum and Collision

Sand is being dropped on a conveyor belt at the rate of M kg / s ....

Sand is being dropped on a conveyor belt at the rate of Mkg/s\mathrm{M} \mathrm{kg} / \mathrm{s}. The force necessary to keep the belt moving with a constant velocity of v m/sv \mathrm{~m} / \mathrm{s} will be

Options

  1. AZero
  2. BMv\mathrm{M} v newton
  3. C2Mv2 \mathrm{M} v newton
  4. DMv2\frac{M v}{2} newton

Correct answer

B. Mv\mathrm{M} v newton

Step-by-step solution

Force =vdudt=Mv=v \frac{d u}{d t}=M v
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