BPSC – Combined Competitive Examination · ప్రశ్న 121
We apply a force of 200 newtons on a wooden box and push it across the floor at constant velocity. The friction force will be:
సమాధానం చూపించు & వివరణ
సమాధానం: (B) 200 N
వివరణ
By Newton's first law, zero acceleration means the forces balance: friction = 200 N.
- (A) తప్పు
Wrong: at constant velocity net force is zero, so friction equals 200 N.
- (B) సరైనది
Correct: constant velocity means applied force = friction = 200 N.
- (C) తప్పు
Wrong: friction cannot exceed the applied force if velocity is constant.
- (D) తప్పు
Wrong: not balanced with 200 N.