Universal Gravitation

Which of the following formulas is the correct equation for the law of Universal gravitation?

A moon is located at 1 unit out from the planet it orbits. If that moon was orbiting at 2 units out from the planet, how much would the gravitational force on the moon be compared to its distance at 1 unit?

• twice as much

• 4 times as much

If I double the mass of one object without changing anything else, What would happen to the gravitational force between that object and any other object?

• Doubles

• Quadruples

• Cut in Half

What happens to Gravitational force if I double both of the masses but don't change their distance?

• doubles

• half as big

• 4 times bigger

Calculate the force of gravity (F) between two objects whose masses are m₁ = 100 kg and m₂ = 1000 kg if they are separared by a distance of d = 500 m.

• 2.67 * 10^-11 N

• 0.4 N

• 6.67 * 10^-11 N

• 1.3 * 10^-8 N

Find the distance between two objects whose masses are m₁ = 4,500 kg, and m₂ = 8,700 kg; if the gravitational force between them is F = 2.0 x 10^-8 N.

• 130565.25 m

• 361.34 m

• 0.19575 m

• 0.783 m

I man who weighs 1000N on the surface of the earth will weigh how much at twice the distance in the atmosphere.

• 500 N

• 250 N

• 2000 N

• 4000N

At what point is the force of gravity on an object greatest

• At the center of the earth (Core of the earth)

• At twice the distance from the surface of the earth

• At the surface of the earth

• The force of gravity ios the same irrespective of distance from the center of the earth

If the sun's mass is 2.0x10³⁰ kg, and itsradius is 7.0 x 10⁸ m, what is the strength of its gravitational field, "g"?

• 9.8 m/s²

• 272.2 m/s²

• 27.2 m/s²

• 200 m/s²

Is it true that the moon falls?

• No, it could have fallen by now.

• No, there is no good explanation as to why

• Yes, the moon is falling around the earth due to its tangential velocity.

• Yes, the moon is falling straight down.