Answer:
777.59N
Explanation:
(The forward strength of a car is a fraction f = 0.15 of its weight. What power does the engine have if the mass of the car is 1.5t and reaches a top speed of 144km / h?)
F = Mass * acceleration
Acceleration =change in velocity / time
F = Mv / t
F = 0.15mg
M = 1.5t
g = 9.8 m/s
V = 144 km/hr= (144 * 3600) / 1000 = 518.4 m/s
0.15mg = mv / t
0.15 * g = v/t
0.15 * 9.8 = 518.4 / t
1.47t = 518.4
t = 518.4 / 1.47 = 352.65s
But mass = 1.5t
Mass = 1.5 * 352.65 = 528.97kg
F = mv / t
F = (528.97 * 518.4) / 352.65
F = 777.59N
