Astronauts on the first trip to mars take along a pendulumthat has a period on earth of 1.50 {\rm s}. the period on mars turns out to be 2.45{\rm s}.what is the free-fall acceleration onmars?

3.7 m/s^2

Explanation:

The period of a simple pendulum is given by:

where L is the length of the pendulum and g is the free-fall acceleration on the planet.

Calling L the length of the pendulum, we know that:

is the period of the pendulum on Earth, and is the free-fall acceleration on Earth

is the period of the pendulum on Mars, and is the free-fall acceleration on Mars

Dividing the two expressions we get

And re-arranging it we can find the value of the free-fall acceleration on Mars:

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

he made 11 calls in one day