Question

The displacement of a S.H.M. doing particle when K.E. = P.E. (amplitude = 4 cm) is(a) 2√2 cm(b) 2 cm(c ) 1/√2 cm(d) √2 cm

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