A sports car is accelerating up a hill that rises 19.0° above the horizontal. The coefficient of static friction between the wheels and the road is µs = 0.91. It is the static frictional force that propels the car forward. (a) What is the magnitude of the maximum acceleration that the car can have? What is the magnitude of the maximum acceleration if the car is being driven down the hill?
2006-10-26 15:48:04 · 2 answers · asked by Any help? 1 in Science & Mathematics ➔ Physics
a) Friction = (force causing acceleration) + (uphill component of weight)
u*m*g*cos(19) = ma + m*g*sin(19)
b) Change the sign on the angle in the last term.
2006-10-26 16:11:58 · answer #1 · answered by sojsail 7 · 0⤊ 0⤋
one important point you neglected to mention, the kind of car it's horsepower, what are the conditions
2006-10-26 15:54:40 · answer #2 · answered by bprice215 5 · 0⤊ 1⤋