The swinging pendulum has 10 joules of potential energy at its maximum height at points (1) and (5). if the mass of the pendulum is 10kg, how fast is the pendulum moving at point (3)?

Answer(b) 60 miles per hour;

Make them both to where they have the denominator of 18that makes 3/2 equal 27/18 and 1/9 equal 2/18so now you have  27/18x+5=2/18subtract 5 from the other sideso now you have 27/18x+2/18-5then subtract 2/18 from 27/18 to get 25/18x=-5then divide 25/18 by -5 and your answer will be  -5/18

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