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

When a net force acts on an object, we observe that the object accelerates:

(a) opposite to the direction of force, with acceleration proportional to the force acting on the object.

(b) opposite to the direction of force, with acceleration proportional to the mass of the object.

(c) in the direction of force, with acceleration inversely proportional to the force acting on the object.

(d) in the direction of force, with acceleration proportional to the force acting on the object.

Answer: Verified

(d) in the direction of force, with acceleration proportional to the force acting on the object.

Explanation: According to Newton's second law of motion,

F=maF = ma

when a net force acts on an object, the object accelerates in the direction of the net force. The acceleration produced is directly proportional to the force acting on the object and inversely proportional to its mass.

Download Free PDF
(All Q's of this Chapter solved)
More NCERT Questions
Why does a canoe move forward when the canoeist pushes water backwards with their paddle and why does it move faster when they push harder? [Pg. No. 94] Suppose the same canoeist uses the same paddle force in two different canoes, one empty and one carrying another passenger. In which case will the canoe move faster? [Pg. No. 94] A weightlifter lifts a barbell. List two forces that are acting on the barbell. Are these forces balanced if the weightlifter keeps the barbell steady? [Pg. No. 97] An object is moving with a constant velocity. Is there a net force acting upon it? [Pg. No. 101]