Acceleration on the Moon

  • #1

Homework Statement


1.JPG


Homework Equations


F=ma

The Attempt at a Solution


I know it's either B or D

Weight = mg so let's say mass of ball is 11kg and gravity on moon is 6, so weight would be 66N

since acceleration a = F/m and we can say that F=mg

therefore a = mg / m which leaves: a=g

and because on the moon the gravity is less this means acceleration is less....yet this is wrong and the answer is D??
 

Answers and Replies

  • #2
Janus
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You calculated the acceleration due to gravity, not the acceleration of the ball due to the force of the spring. One acts downward and the other upward.
 
  • #3
You calculated the acceleration due to gravity, not the acceleration of the ball due to the force of the spring. One acts downward and the other upward.

Yep, I completely glossed over that, thanks.

Intuitively it makes sense now, but is there a formula I can use to get a better understanding?
 
  • #4
jbriggs444
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Yep, I completely glossed over that, thanks.

Intuitively it makes sense now, but is there a formula I can use to get a better understanding?
∑F = ma
 

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