mark weighs 200 Newton's on earth, where the force of gravity is 10 m/s^2. He goes to mars, where the force of gravity is 3.5 m/s ^2. What is marks weight on mars?

A)200 N
B)700 N
C)570 N
D)70 N

To find Mark's weight on Mars, we need to multiply his weight on Earth (200 Newtons) by the ratio of the gravitational forces on Mars to that on Earth.

The ratio of the gravitational forces on Mars to Earth is 3.5/10 = 0.35.

Therefore, Mark's weight on Mars is 200 N * 0.35 = 70 N.

Therefore, the correct answer is D) 70 N.