Physics Force & Motion PMDC 2021
PMDC Verified Question 103 of 137
What is the accelerating force on the Diwali rocket if it ejects 0.05 kg of gases per second at a velocity of 400 m/s?
A
20 N
B
20 dynes
C
1000 N
D
22 dynes
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: 20 N
Concept:

Thrust equation.

Solution:

  • \( F = v (dm/dt) = 400 \times 0.05 = 20 \text{ N} \).


Why other options are incorrect:

Wrong units.

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