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STD 11 - 5. work,energy,power and collision — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 5. work,energy,power and collision4 Marks
MCQ
 spring block system is placed on a rough horizontal floor. The block is pulled towards right to give spring some elongation and released. the block will have maximum velocity when
  • A
    the spring force becomes zero
  • B
    the acceleration of block becomes zero
  • C
    the net force becomes zero
  • ✓
    Both $(b)$ and $(c)$
✓

Answer

Correct option: D.
Both $(b)$ and $(c)$
d
Force, $F=m a=m \frac{d v}{d t}$ where $a$ is the acceleration.

Velocity is maximum when $\frac{d v}{d t}=0,$ thus the net force and acceleration become zero.

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