# physics

posted by .

a marble is dropped from the top of a skyscraper. Is the work done by earths gravitational force on the marble equal to, smaller than or larger them that done by the marbles gravitational force on earth? Why?

newtons 3rd law: force on marble due to earths grav. field is equal to force on earth due to marbles grav. field

Work= force * distance

marble drops significant amount but earth doesnt move by any significant amount
work done by earth is much larger

in freefall as the earth and the marble both are, when the marble is falling, the earth Does move toward the marble. It moves in proportion to the differences in the 2 masses. the work done is equal. Imagine if the marble was .50 the mass of the earth, or the same, or 2 times.

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### science-physics

1) A man places a ladder against a wall. He then climbs up the ladder. Briefly describe the forces acting on the man, on the ladder & on the wall?
2. ### science

The gravitational force of the Earth in relation to the gravitational force of everything else on Earth represents a(n) _____ that causes everything to all toward the center of the earth. Is the answer unbalanced force; balanced force; …
3. ### physics

A 4.9 g marble is fired vertically upward using a spring gun. The spring must be compressed 8.0 cm if the marble is to just reach a target 29 m above the marble's position on the compressed spring. (a) What is the change in the gravitational …
4. ### Physics - Gravitational force

Find the gravitational force between earth and the sun. I am using the formula Fg = (G*m1*m2)/(r^2) where G = 6.67*10^-11 m1 = 6.0*10^24kg m2 = 2.0*10^30kg r = should i use the sun's radius or the earths (Rearth = 6.38*10^6; Rsun = …
5. ### physics

A 5.0 gm marble is fired vertically upward using a spring gun. The spring must be compressed 8 cm if the marble is to just reach a target 20 m above the marble’s position on the compressed spring .(a) What is the change in the gravitational …
6. ### science

Imagine a marble dropped from a tall building at 1.62 meters per second. How long would the marble be in the air. Velocity= Gravitational acceleration x time
7. ### physics

Which of the following best describes the strength of the gravitational force on Earth due to your mass?
8. ### Physics

When the space shuttle (mass of the shuttle = 2 x10^6 kg) was at the outer limit of Earth's atmosphere (distance = 350 km above Earth's surface), astronauts measured the gravitational force from Earth to be equal to 1.7 x 10^7 newtons. …
9. ### physics

Which of the following correctly describe the gravitational attraction between Earth and the Moon?
10. ### physics

Two uniform 81.6 g marbles 1.81 cm in diameter are stacked in a container that is 2.78 cm wide. 1) Find the force that the container exerts on the marble at the point of contact A, B and C. 2) What force does each marble exert on the …

More Similar Questions