question_answer 45)

                  Two identical springs of spring constant K are attached to a block of mass m and to fixed supports as shown in Fig. When the mass is displaced from equilibrium position by a distance \[x\] towards right, find the restoring force

Answer:

                  \[F={{F}_{1}}+{{F}_{2}}=\text{ }Kx+(-Kx)=2Kx\]                  \[ve\]  sign shows that direction of F is opposite to die direction of \[x\] . Thus, restoring force acts towards left.