A force of 100 Dynes acts on mass of 5kg for 10sec. The velocity produced is_
Correct answer: B. 0.2 cm/sec
- A. 2 cm/sec
- B. 0.2 cm/sec
- C. 20 cm/sec
- D. 2000 cm/sec
Explanation
To find the velocity produced, first convert the force from Dynes to Newtons: 100 Dynes = 0.001 Newtons. Use Newton's second law (F = ma) to find acceleration: a = F/m = 0.001 N / 5 kg = 0.0002 m/s². Over 10 seconds, the change in velocity (Δv = a × t) is 0.0002 m/s² × 10 s = 0.002 m/s. Convert this to cm/s: 0.002 m/s = 200 cm/s. Thus, the correct answer is 200 cm/sec. The other options arise from either incorrect unit conversions or miscalculations of acceleration or time.
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