Gujarati
Hindi
5.Work, Energy, Power and Collision
medium

A block of mass $2\,\,kg$ is placed on a rough inclined plane as shown in the figure $(\mu  = 0.2)$ so that it just touches the spring. The block is allowed to move downwards. The spring will be compressed to a maximum of

A

$0.1\,\,cm$

B

$6.6\,\,m$

C

$1\,\,cm$

D

$13\,\,cm$

Solution

By $WET$      $W_g + {W_{{f_r}}} + W_{R.F} = 0$

                  $mg\,\,sin\,\,30x -\mu mg\,\,cos\,30x -1/2 kx^2 = 0$
                 After solving $x = 13\,\,cm.$

Standard 11
Physics

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