Apply Newtons first law to each of the following situations. In which situations

Question

Apply Newtons first law to each of the following situations. In which situations can you conclude that the object is undergoing a net interaction with one or more other objects? (Select all that apply.)

Apply Newton first law to each of the following situations. In which situations can you conclude that the object is undergoing a net interaction with one or more other objects? (Select all that apply.) A spacecraft travels at a constant speed toward a distant star A hydrogen atom remains at rest in outer space A book slides across the table and comes to a stop A car travels at constant speed around a circular race track A proton in a particle accelerator moves faster and faster

Explanation / Answer

A particle at rest continues to remain in the state of rest or uniform motion until some external force is applied.
(a) constant speed ; constant direction=> constant velocity => net acc =0 => uniform motion => No interaction
(b) rest = net acc =0 =>NO interaction
(c) book is brought to rest after some motion =>change in vel => net acc(-ve in magnitude) => Interaction

(d) during a circular motion; speed = constant; direction = variable => change in velocity => accleration => Interaction

(e) vel increases = +ve accleartion => Interaction with other

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