A frictionless pendulum clock on the surface of the earth has a period of 1.00 s. On a distant planet, the length of the pendulum should be shortened slightly to have a period of 1.00 s. What is true about the acceleration due to gravity on the distant planet?
1. The gravitational acceleration on the planet is equal to g.
2. The gravitational acceleration on the planet is slightly less than g.
3. We cannot tell because we do not know the mass of the pendulum.
4. The gravitational acceleration on the planet is slightly greater than g.