Mars One is a Danish organization that plans to
establish a human colony on Mars by 2025. As
awesome as this would be, the new colonists may have
some problems with staying on the ground: the gravity
on Mars is much weaker than it is on Earth. An object’s
weight can be calculated by multiplying its mass by the
local acceleration due to gravity: 𝑤 = 𝑚 × 𝑔. It’s that 𝑔
that’s different for each planet: on Earth, 𝑔 = 9.81, but
on Mars, 𝑔 = 3.71.
Question:
If one of the future colonists weighs 155 pounds on Earth, what will their weight be on
Mars?

Question

Mars One is a Danish organization that plans to 
establish a human colony on Mars by 2025. As 
awesome as this would be, the new colonists may have 
some problems with staying on the ground: the gravity 
on Mars is much weaker than it is on Earth. An object’s 
weight can be calculated by multiplying its mass by the 
local acceleration due to gravity: 𝑤 = 𝑚 × 𝑔. It’s that 𝑔
that’s different for each planet: on Earth, 𝑔 = 9.81, but 
on Mars, 𝑔 = 3.71. 
Question:
If one of the future colonists weighs 155 pounds on Earth, what will their weight be on 
Mars?