Mark weighs 200 Newtons on Earth, where the force of gravity is 10 m/s2. He goes to Mars, where the force of gravity is 3.5 m/s2. What is Mark's weight on Mars?

Question

Step 1 : Solve for Mark's mass on Earth using weight equation.

Step 2: Use Mark's mass from step 1 and the gravity on Mars to find Mark's weigh on Mars. Use weight equation.

a
70 N
b
570 N
c
700 N
d
200 N

Answer 1

Step 1: Mark's weight on Earth = mass x gravity on Earth
200N = mass x 10 m/s^2
mass = 20 kg

Step 2: Mark's weight on Mars = mass x gravity on Mars
Mark's weight on Mars = 20 kg x 3.5 m/s^2
Mark's weight on Mars = 70 N

Therefore, Mark's weight on Mars is 70 N.

Correct answer: a) 70 N