Gravitational Force questions


1. Calculate the gravitational force between two 50 kg objects if they are 7.5 x 10^-1 m apart?

2. the gravitational force between two objects are 2.1 x 10^-1 m apart is 3.2 x 10^-6 N. if the mass of one object is 55 kg, what is the mass of the other object?

3. Two students are sitting 1.5 m apart. one student has a mass of 70 kg and the other 52 kg. what is the gravitational force between them?

4. if two objects, each with a mass of 2 x 10^2, produces a gravitational force between of 3.7 x 10^-6, what is the distance between them?

5. on the surface of planet X an object has a weight of 63.5 N and a mass of 22.5 kg. what is the acceleration due to gravity on the surface of planet X?

6. Jupiter is the largest planet in the solar system. it has a mass of 1.9 x 10^27 kg and a radius of 7.18 x 10^7 m. What is the acceleration due to gravityof an object near jupiters surface?

7. If two objects with a mass of 215 kg, produce a gravitational force between them of 5.3 x 10^-6 N, what is the distance between them?

These are questions that I'm confused with, and can't seem to get a right answer.

Thank you


Gold Member
This seem like they can all be answered using one general equation. Do you have an idea of what that equation is?
These are all related to the same equation:


where G is the gravitational constant: [itex]G=6.67\times10^{-11}[/itex] m3kg-1s-2. Each question uses this formula, though questions 5 and 6 require further that [itex]F=ma[/itex].

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