A 0.40 kg mass is attached to a spring with a force constant of 26 N/m and released from rest a distance of 3.2 cm from the equilibrium position of the spring. (a) Give a strategy that allows you to find the speed of the mass when it is halfway to the equilibrium position. (b) Use your strategy to find the speed.
Solution. We know that mass m=0.40kg, a force constant k=26 N/m. So, we can compute
So, the motion equation is
The solution clearly explains the concepts while solving the problem.