Question

Susan jumps off a chair. As she is falling, the Earth’s gravitational force on her is higher than her gravitational force on the Earth.
a.) True
b.) False

Answer 1

Newton's third law, each force has an equal and opposite reaction.
Earth pulls on her, as she pulls on Earth.
Earth wins!

Answer 2

Lol ok, thank you!

Answer 3

Is it ok if I ask you another question?

Answer 4

Fine.
Was it clear that the forces on both are the same?
"Earth wins" just meant she moves more than the Earth moves.

Answer 5

Yeah I understood thw question just physics is...... um different..... a lot harder! Ok so here it is:
An astronaut orbits the Earth 500 miles above its surface. She appears to be weightless because there is virtually no gravitational force on her.
True
False

I think this is true because there is 1/6 the gravity in space as to earth!

Answer 6

Although there is less gravitational force from the Earth, the farther you get from its center,
F = G m M/r^2,
where r is the distance from the center, The earth's radius is about 4000 miles, so this factor goes from 1/(4000)^2 5o 1/(4500)^2, not a big difference. The feeling of weightlessness comes from the balance of the "centrifugal force"
mv^2/r with the gravitational force.

Answer is FALSE

Answer 7

Gravitational force at Moon's surface is 1/6 that at the Earth's surface, and
it is due to the Moon's mass not the Earth's.

Answer 8

Centrifugal Force?

Answer 9

Oh nevermind, it means force that draws a rotating body away from the middle of the rotation, right?

Answer 10

Right. It seems like a force, though it is actually the
resistance to the change in direction, which is an acceleration.