Question

Graph shows the x(t) curves for three experiments involving a particular spring-block system oscillating in SHM. The kinetic energy of the system is maximum at t = 4 s for the experiment: (Which experiment has highest kinetic energy at given time instant when compared )

• A. 1
• B. 2
• C. 3
• D. All have same kinetic energy

Answer 1

Answer: (A)

1

Answer 2

In SHM, kinetic energy is maximum at the equilibrium position ($x=0$) and zero at the extreme positions ($x=\pm A$). At $t=4$ s, experiment 1 is at $x=0$ (equilibrium). Experiments 2 and 3 are at their extreme positions ($x=A_2$ and $x=-A_3$). Therefore, experiment 1 has maximum kinetic energy.