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3/3 MCQs for:
Forces

Three forces act on an object. If the object is in translational equilibrium, which of the following must be true?

1) The vector sum of the 3 forces must be equal to zero;

2) The magnitudes of the 3 forces must be equal;

3) All the 3 forces must be acting at the same point.

An object weighs 100.0 N on the surface of the earth, the radius of which is R.

If the object is raised through a distance R above the surface of the earth, it will weigh:

Which of the following pairs of forces are both contact forces?