Physics-
General
Easy
Question
A block of mass 1 kg is placed on a rough horizontal surface. A spring is attached to the block whose other end is joined to a rigid wall,as shown in the figure. A horizontal force is applied on the block so that it remains at rest while the spring is elongated by x.
Let 
be the maximum and minimum values of force F for which the block remains in equilibrium. For a particular x, = 2 N. Also shown is the variation of 
, the elongation of the spring The value of 
, if x = 3 cm is :
- 0
- 0.2
- 5
- 1
The correct answer is: 0
When 
, which is less than 
The block will be at rest, without applying force F.
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