GK
UNITS DEVICES DIMENSIONS AND MEASUREMENTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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watt
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pascal
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newton second
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newton per meter
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Detailed explanation-1: -The newton-second (also newton second; symbol: N⋅s or N s) is the unit of impulse in the International System of Units (SI). It is dimensionally equivalent to the momentum unit kilogram-metre per second (kg⋅m/s). One newton-second corresponds to a one-newton force applied for one second.
Detailed explanation-2: -Impulse (J) = Applied force (F)×time (t) Since the SI units of force (F) and time (t) are N and s respectively, the SI unit of Impulse is Newton-second (N-s). Hence, the correct answer is option (2).
Detailed explanation-3: -Newton’s second law of motion is perhaps his most famous. This leaflet will discuss this law and give some examples of its use. Momentum is a vector quantity and is expressed in SI units by kg m s−1 or equivalently by N s.