# Effects of slightly lower gravity?

If a planet were to have a gravitational acceleration of .7g, how different would it be from walking on earth, assuming this is not someone born outside of earth. Would it be a slight bounce in your step or more noticeable than that?

Sorry if this has been asked, I couldn't find anything when searching, just about super low or no gravity.

• You can experiment it yourself. Find a building with a fast elevator. 0.7~0.8g is what you feel when you go up and it starts decellerating. – Renan Aug 29 '19 at 17:52
• Hmm... The person has already left. But the moon is not 0.6 gravity but 0.166 gravity. – puppetsock Aug 29 '19 at 18:55

Here is what happens when you walk: there is one horizontal frictional compnent, and another vertical Normal component to the walk.

When the gravity goes from g -> 0.7 g, this is going to effect on the counterbalancing of N, the Normal component. However, there will not be any effect on the frictional component (assuming point landing).

So you will see a distinct hop in the walk (as you will go little higher than usual).

• Thumbs up for that drawing. :^) – puppetsock Aug 29 '19 at 18:34

Definitely noticable, but not "I have superpowers".

Basically, it'd have the same effect as someone who was pretty overweight going on a heck of a diet. I'm 6'2 and 240lbs on Earth right now, on your world I'd feel like I weighed 170, which was about thirty years ago for me. So yeah, pretty noticeable, and older people would notice the difference a lot more since it wouldn't just be "Hey, I'm feeling stronger", it'd be "Wow, all this stuff doesn't HURT anymore."

• Or more easily achievable (since diets are slow enough that you adapt to the weight change): go backpacking for a couple of weeks with a pack that's ~30% of your body weight, then notice how you walk the first day you're home. – jamesqf Aug 29 '19 at 17:58