A few days ago
bluenecklace

physics??????

F = G(Mm/r^2)

F – gravitational force

Mm – masses

r – length

The SI units of F are = kg * m/s^2

What are the SI units of G?

This may be an really easy question but it’s my first homework assignment in AP/IB physics and i was kind of lost during the first lecture. thank you so much for your help!! 🙂

Top 1 Answers
A few days ago
Corran

Favorite Answer

This kind of question will really make your algebra skills shine. Firstly, solve the symbolic equation (F = G(Mm/r^2)) for G. Then replace each variable with the standard SI unit. For example, a force is measured in Newtons (which is a kg-m/s^2), mass is measured in Kg, and distance is measured in meters. Then you can cancel units from the equation and end up with the units for G.

This type of stuff is called dimensional analysis and is very important in the pure sciences (physics, chemistry) and engineering.

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