Assume the equation U = mgh. If m is quadrupled and h is halved, by what factor does U change? Choose the correct choice from the following answers: A) 3 B) 2 C) 4 D) 1/2 E) 16
The equation is U = mgh.   If m is quadrupled and h is halved, the equation becomes:   U = (4m)*g*(h/2)   U = 2mgh   Initially U was mgh and now it is 2mgh, therefore U increases by a factor of 2.   Answer = 2 = 2
<result>B</result>
Assume the equation U = mgh. If m is quadrupled and h is halved, by what factor does U change?