Practice question · Select all that apply
Select every situation in which the net force on the object is ZERO.
Hints
- Zero net force means zero acceleration, not zero velocity.
- One option has zero velocity yet a very definite net force.
Show the answer
- B. A puck gliding at constant velocity on frictionless ice
- D. A book resting on a table
- E. A parachutist whose drag has grown to match their weight
Why
Constant velocity and rest both mean zero acceleration and so zero net force. A ball at the top of its flight is the trap: it is momentarily motionless but gravity is still pulling on it, so the net force is its full weight.
Practise Newton's Laws and Forces
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