Laws of MotionHard
Question
A block is first placed on its long side and then on its short side on the same inclined plane (see figure ) . The block slide down in situation II but remains at rest in situation I. A possible explanation is
Situation - I
Situation = II 
Situation - I
Situation = II Options
A.The normal contact force is less in situation -II
B.The frictional force is less in situation -II because the contact area is less.
C.The shorter side is smoother
D.In situation -I, frictional force is more.
Solution
The is due to less frictional force or low friction coefficient.
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