GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1 and 2
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2 and 3
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1, 2 and 3
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None of the above
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Detailed explanation-1: -The 4 primary factors that affect the power of a statistical test are a level, difference between group means, variability among subjects, and sample size.
Detailed explanation-2: -If work is done faster, power is higher. If work is done slower, power is smaller. Since work is force times displacement (W=F*d), and velocity is displacement over time (v=d/t), power equals force times velocity: P = F*v. More power is seen when the system is both strong in force and fast in velocity.
Detailed explanation-3: -Force is the fundamental result of an interaction between two objects, while power is an expression of energy consumed over time (work), of which force is an element. Force and power can both be described and measured, but a force is an actual physical phenomenon, and power in itself is not.
Detailed explanation-4: -Work is done when a force is applied to an object through a distance. This means that when a force is applied to an object through a distance, the object’s total energy will be affected.