Question

identify whether the net force is zero or nonzero for each scenario.
objects motion\tς\\(\vec{f}\\) acting on the object
remaining at rest
speeding up
slowing down
changing direction
moving with constant velocity

Explanation:

Step1: Recall Newton's first law

An object at rest or moving with constant velocity has zero net - force.

Step2: Analyze accelerating objects

An object speeding up, slowing down or changing direction is accelerating. According to Newton's second law ($\vec{F}_{net}=m\vec{a}$), an accelerating object has a non - zero net force.

Answer:

• remaining at rest: zero
• speeding up: nonzero
• slowing down: nonzero
• changing direction: nonzero
• moving with constant velocity: zero