Question

select the correct answer. with all his gear, neil armstrong weighed 360 pounds on earth. when he landed on the moon, he weighed 60 pounds. why?
a. his mass changed while traveling to the moon.
b. the gravity on the moon is six times the gravity on earth.
c. the gravity on the moon is less than the gravity on earth.
d. he experienced the effects of a gravity slingshot.

Explanation:

• Option A: Mass is the amount of matter, which doesn't change with location, so A is wrong.
• Option B: 360 pounds on Earth and 60 pounds on Moon means Moon's gravity is 1/6 of Earth's, not six times, so B is wrong.
• Option C: Since weight (which depends on gravity) is less on Moon (60 < 360), Moon's gravity is less than Earth's, so C is correct.
• Option D: A gravity slingshot is for spacecraft trajectory, not human weight change, so D is wrong.

Answer:

C. The gravity on the Moon is less than the gravity on Earth.