Question

You crash land your spaceship on a mysterious planet. You want to figure out g, the acceleration due to gravity, on the surface of the planet. Fortunately, you brought a stopwatch and simple pendulum: a 75.0 centimeter long string tied to a 1.50 kg mass. You measure the period of the pendulum to be 1.52 seconds. What is the value of g, in units of m/s2? Assume there is no air resistance as the pendulum swings.

ans: 12.8 m/s^2

Answer 1

The period of a pendulum is given by

T = 24

r?

Putting the value in SI units

g= (75 x 10-2) x 47 -= 12.8 m/s2 1.522

So, the answer is 12.8 m/s².