Question 683725: Hi guys, the last question I put up had such a fantastic response, it'd be great if you could help me out with one more. Word problems really confuse me.
The energy in Joules (j) of a particle varies directly with the square of it's speed, in m s ^-1. A particle moving at 20 m s ^-1 has 50J of energy.
a) How much energy has a paricle moving at 4ms^-1?
b) At what speeed is a particle moving if it has 200J of energy? Answer by josmiceli(10616) (Show Source):