An object moves with an acceleration of 3 ms−2 when a force of 30 N is applied. The mass of the body is ___ kg.
A
30
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B
10
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C
15
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D
60
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Solution
The correct option is B 10 Let m be the mass of the body. Let the force applied on the object be F with acceleration a Given : force applied, F=30N and acceleration a=3ms−2. From the second law, F=ma. ⇒30=m×3. ⇒m=10kg.