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How do you find a common denominator of a fractions?
you multipy the smaller denomnater to equal the other fraction and multipy the numarter by the same number as the denomneter got multiplied by
What is it called when you multipy or divide two quantities by the same number?
Re-scaling or (for selected vales of the same number) normalising.
Weight x distance divided by time?
Weight has same dimension and unit as force. Distance has same dimension and unit as displacement. So weight * distance has same dimension and unit as force * displacement. Force * displacement is work done by the force. Work divided by time to do the work is Power. So weight * distance divided by time also has same dimension and unit as Power although it is not power. S.I. unit of weight * distance divided by time is Newton *meter/second or Nms-1 (in abbr.) It's dimensions are 1, 2, -3 in mass, length and time respectively. Note that given quantity's unit can't be joule/second or watt because weight * distance is not work done, only unit and dimension are same1 . 1. Two physical quantities may have same dimensions and units but that doesn't mean they refer to same quantity.
How does an incline plane make work easier but does not increase in force?
An inclined plane makes work easier because it allows for a longer distance over which a force can be applied. By exerting a smaller force over a longer distance, the amount of work required is reduced. However, the force exerted remains the same, as the incline does not change the magnitude of the force needed.
How do you make a mixed number to an improper fraction fraction?
multipy the whole number by the denometer, then add that number to your numerator. now that is your numerator and your denomater stays the same.
