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Results tagged with newtonian-gravity
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user 20467
This tag is for questions regarding the Newtonian model of gravity in which the force between two objects is given by $~GMm/r^2~.$ It is a natural phenomenon by which all things with mass or energy – including planets, stars, galaxies, and even light – attract one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.
1
vote
Can you ever exert more downwards force than your weight?
One approach everybody seems to have missed: increase your weight. Put some weights in a strong backpack.
- 1,769
4
votes
Why doesn't orbital body keep going faster and faster?
Since you still seem puzzled I'll try a different tactic here:
You're showing the tangential velocity (A) and the radial acceleration (B) and adding them to get the green arrow. What you're missing …
- 1,769
0
votes
Zero gravity means zero friction?
There's no friction in space?
Strange how every screw just fell out of the ISS!
What's actually going on is you are looking at the friction between an object and the surface it's resting on, neglect …
- 1,769
12
votes
Why is the Moon considered the major cause of tides, even though it is weaker than the Sun?
The highly upvoted answer is right but to make things much simpler:
Tides are based on the change in gravity, not the gravity. That means they drop off at the cube of the distance rather than the sq …
- 1,769