Physics-
General
Easy
Question
Two blocks 
and 
(
) are connected with a spring of force constant 
and are inclined at a angel 
with horizontal. If the system is released from rest, which one of the following statements is/are correct?
- Maximum compression in the spring
if there is no friction anywhere
- There will be no compression or elongation in the spring if there is no friction any where
- If is smooth and is rough there will be compression in the spring
- Maximum elongation in the spring is
if all the surfaces are smooth
if there is no friction anywhere
is smooth and is rough there will be compression in the spring
if all the surfaces are smooth
The correct answer is: There will be no compression or elongation in the spring if there is no friction any where
If the surface is smooth, then relative acceleration between blocks is zero. So, no compression or elongation takes place in spring. Hence, spring force on blocks is zero.
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