Physics-
General
Easy
Question
A block of mass m compresses a spring of stiffness k through a distance 
as shown in the figure. If the block is not fixed to the spring, the period of motion of the block is
- (
+ 4)
- (1 + p)
- none of these.
+ 4)
The correct answer is: ( + 4)
The period of oscillation = 2p
Þ The period of motion till the block is in contact with the spring is
t =
= p then it leaves the spring with a speed v = wA
v = 
Then it moves with constant velocity v for a distance D = l + l = 2l
Þ The corresponding time of motion = t2 = 2l/v
Þ t2 = 
\ The time period of motion = t = t1 + t2
= p + 4 = [p + 4].
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