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5.Work, Energy, Power and Collision
medium
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
D
Both $(b)$ and $(c)$
Solution
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.
Standard 11
Physics
