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When a net force acts on an object, we observe that the object accelerates:
(i) opposite to the direction of force, with acceleration proportional to the force acting on the object.
(ii) opposite to the direction of force, with acceleration proportional to the mass of the object.
(iii) in the direction of force, with acceleration inversely proportional to the force acting on the object.
(iv) in the direction of force, with acceleration proportional to the force acting on the object.
(i) opposite to the direction of force, with acceleration proportional to the force acting on the object.
(ii) opposite to the direction of force, with acceleration proportional to the mass of the object.
(iii) in the direction of force, with acceleration inversely proportional to the force acting on the object.
(iv) in the direction of force, with acceleration proportional to the force acting on the object.
View Answer
The correct option is (iv) in the direction of the force, with acceleration proportional to the force acting on the object.
Newton's second law: acceleration is along the net force and proportional to it (and inversely proportional to mass).
| Option | Claim | Correct? |
|---|---|---|
| (i) | opposite to the force, a ∝ F | No — acceleration is along the force |
| (ii) | opposite to the force, a ∝ m | No — wrong direction, and a ∝ 1/ m |
| (iii) | along the force, a ∝ 1/ F | No — a is proportional to F |
| (iv) | along the force, a ∝ F | Yes — this is F = ma |
