GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The velocity of a 975-kg car is changed from 12.0 m/s to 27.0 m/s in 15s by an external, constant force. What is the magnitude of the force?
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780 N
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975 N
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1, 755 N
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14, 625 N
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none of the above
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Explanation:
Detailed explanation-1: -The velocity of a 975-kg car is changed from 12.0 m/s to 27.0 m/s in 15s by an external, constant force.
Detailed explanation-2: -The SI unit of impulse is Newton-seconds. It is abbreviated as N s. 1 N s is the same as 1 kg m/s.
Detailed explanation-3: -Impulse of force is the product of the resultant force F and the duration of this force t, if the force is constant. Impulse of force is the cause of changes to motion and therefore changes to momentum.
Detailed explanation-4: -The SI unit of impulse is the newton second (N⋅s), and the dimensionally equivalent unit of momentum is the kilogram meter per second (kg⋅m/s).
There is 1 question to complete.