The driver of a 1100kg car moving at 17m/s brakes quickly to 12m/s when he spots a local garage sale. (a) Find the change in the car's kinetic energy. (b) Explain where the "missing" kinetic energy has gone.
2006-12-11 11:04:17 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
the change in the car's kinetic energy : its direction so as to reduce the velocity of the car
the missing energy has transformed into heat between the break and the wheels, and between the car and the road
2006-12-11 11:09:50 · answer #1 · answered by James Chan 4 · 0⤊ 0⤋
.5mv^2
a)158950 changes to 79200 = 79750
b)the missing energy has changed into other forms of energy such as heat, because energy cannot be created nor destroyed
2006-12-11 19:15:00 · answer #2 · answered by free-bird 2 · 1⤊ 0⤋
all I know is that energy is never created nor destroyed
2006-12-11 19:11:36 · answer #3 · answered by here and now 2 · 0⤊ 0⤋