Question

A pendulum bob is raised to a height h and released from rest. At what height will it attain half of its maximum speed?(a) $\frac{3h}{4}$(b) $\frac{h}{2}$(c) $\frac{h}{4}$(d) 0.707h

Answer 1

A clock which keeps correct time at 20°C, is subjected to 40°C. If coefficient of linear expansion of the pendulum is 12 × 10⁻⁶ per °C. How much will it gain or loose in time?(a) 10.3 seconds/day(b) 20.6 seconds/day(c) 5 seconds/day(d) 20 minutes/day