IB Multiple Choice - Gravitational Fields

Test yourself on IB Multiple Choice - Gravitational Fields

• Which of the following forces is NOT repulsive?

• A recently discovered planet has a mass twice as great as Earth's and a radius twice as large as Earth's. What is the approximate size of its gravitational field?

• What do the gravitational field lines close to the surface of the Earth appear to be?

• Which is the correct relation between the gravitational field strength and the gravitational force?

• In the formula $g = \frac{GM}{r^2}$, what does $G$ represent?