You have a 90 w electrical appliance that is on 24 hours per day. at $0.51 per kwh, how much are you paying daily for electricity to operate this appliance?
show your calculations here:

90 watts = 0.09 KW

Energy = (power) x (time) =
                  (0.09) x (24) KWh

Cost = (energy) x (unit price) =
           (0.09 x 24) x ($0.51) = $1.10 per day (rounded)

(Those are very expensive kWh's.)

If there was no gravity then their would be no downword force on the football to have it return the the grownd, and if there was no friction (mainly air friction) then there would be no opposing force the stop the ball from moving through the air allowing the ball to travle ∞.