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September 19, 2014

September 19, 2014

Posted by **stefy** on Saturday, September 16, 2006 at 6:58am.

a. How much work does the child do?"

b. Would you expect more or less work to be done if the child pulled upward at the same angle?

Work is force*distance *CosTheta where Theta is the angle between the distance direction and the force vector. Later on, you will use something called the DOT product, which is a vector function. Work = force dot distance.

Work= 6*4*Cos37

Ignoring friction, there is no difference in up or down. Including friction, pushing downward increases the friction force...think this out.

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