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 spring constant of the spring is:
- 25
- 20
- 2.5
- 50
The correct answer is: 25
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