6 - Gravity and circular motion Flashcards
1
Q
What is gravitational field strength at a point?
A
force per unit mass acting on a much smaller mass placed at the point in the field
2
Q
What is Newton’s law of gravitation?
A
F = G m1m1/r^2
3
Q
When can Newton’s law of gravitation be applied?
A
when one object is significantly larger than the other object, so the smaller object approximates to a point charge
