Chapter 6
How Forces Affect Motion
CBSE Class 9
Science Solutions
Educart Science class Class 9 NCERT Exemplar cover
Question:

The position-time graph for four objects A, B, C and D moving along a straight line are shown in the given figure. A net force acts on:

Question image
Question image

(a) Object A      (b) Object B
(c) Object C      (d) Object D

Answer: Verified

(c) Object C

Explanation: A curved position-time graph indicates that the velocity of the object is changing with time, which means the object is accelerating. According to Newton's second law of motion, an accelerating object experiences a net force. Therefore, a net force acts on object C.

The objects A and D have constant velocity whereas the object B is at rest, so no net force acts on them.

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More NCERT Questions
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