A 2.0-kg object moves in a straight line on a horizontal frictionless surface.
The graph shows the velocity of the object as a function of time. The various equal time intervals are labeled using Roman numerals: I, II, III, IV, and V. The net force on the object always acts along the line of motion of the object.
-Which section(s) of the graph corresponds to a condition of zero net force?
A)V only
B)III only
C)II and IV
D)II, III, and IV
E)I, III, and V

Question

A 2.0-kg object moves in a straight line on a horizontal frictionless surface.
The graph shows the velocity of the object as a function of time. The various equal time intervals are labeled using Roman numerals: I, II, III, IV, and V.  The net force on the object always acts along the line of motion of the object.
-Which section(s) of the graph corresponds to a condition of zero net force?
A)V only 
B)III only 
C)II and IV 
D)II, III, and IV 
E)I, III, and V

Quizplus · Accepted Answer

The Answer is C

A 20-Kg Object Moves in a Straight Line on a Horizontal