An object moves with constant speed in a straight line. Which of the following statements can be true according to Newton's laws of motion? I. No force is acting. II. Only one nonzero force is acting.III. Two nonzero forces are acting. IV. Three nonzero forces are acting.
A) Only I.
B) Only I and II.
C) Only II and III.
D) Only I, III, and IV.
E) Only II, III, and IV.

Question

Quizplus · Accepted Answer

According to Newton's first law, an object moving with constant speed in a straight line has no net force acting on it. This can occur if no forces are acting (I), or if multiple forces are acting but they balance each other out (III and IV).

An Object Moves with Constant Speed in a Straight Line