Q21 of 111 Page 252

The springs shown in the figure (12-E7) are all upstretched in the beginning when a man starts pulling the block. The can exerts a constant force F on the block. Find the amplitude and the frequency of the motion of the block.


Since are in series, let an equivalent spring constant be Therefore



, so equivalent spring constant k is given as






More from this chapter

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19

A particle of mass m is attached to three springs A, B and C of equal force constant as shown in figure (12-E6). If the particle is pushed slightly against the spring C
and released, find the time period of oscillation.


 20

Repeat the previous exercise if the angle between each pair of springs is 120o initially.


 22

Find the elastic potential energy stored in each spring shown in figure (12-E8), when the block is in equilibrium. Also find the time period of vertical oscillation of the block.


 23

The string, the spring and the pulley shown in figure (12-E9) are light. Find the time period of the mass m.