Ten questions. The result tells you which lessons you may skip.
The distance between two point masses is tripled. The gravitational force between them becomes
A mango falls from a tree. The force of the mango on the Earth is
A \(4\,\text{kg}\) mass is at \(x = 0\) and a \(9\,\text{kg}\) mass at \(x = 4\,\text{m}\). A \(1\,\text{kg}\) mass is placed at \(x = 1\,\text{m}\). The net gravitational force on it is
Four equal masses sit at the corners of a square. A fifth mass is placed at the centre of the square. The net gravitational force on the fifth mass is
Two masses \(m\) and \(9m\) are a distance \(d\) apart. The net gravitational field is zero at a point on the line between them, at a distance from \(m\) of
A test mass moves along the axis of a uniform ring of radius \(R\), starting at its centre. The field on it is greatest at a distance from the centre of
A small body is placed inside a uniform hollow sphere, away from its centre. The gravitational field of the sphere there is
Take \(g = 9.8\,\text{m/s}^2\) at the Earth's surface. At a height equal to the Earth's radius, \(g\) is
Treat the Earth as a uniform sphere with \(g = 9.8\,\text{m/s}^2\) at its surface. Halfway from the surface to the centre, \(g\) is
The Earth's spin does not change the effective value of \(g\)