What amount of force is to be applied on a body of 4 kg mass to achieve a velocity of 30 ms−1 in 6 seconds?
A. 45 N
B. 18 N
C. 30 N
D. 20 N
সঠিক উত্তরঃ
D.
20 N
Explanation: F= ma =(4 × 30/6)N = (4×5)N =20 N
[Tapan Sir: Edition-2022, Page-241]
[Tapan Sir: Edition-2022, Page-241]
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