A 1210 kg car is driving on 60 km/h on an inclined plane. The car is...

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Physics

A 1210 kg car is driving on 60 km/h on an inclined plane. Thecar is located on the top of the plane. The plane is 655 m long andthe angle is 4.50 degrees.
a) What will the speed of the carbe if there is no friction ?
b) Now the car is on 85 km/h at the bottom of the inclinedplane. How much friction force works on the car its way down ?

c) If the same friction force works on the car as when it drow upthe plane, what does the mechanical power need to be so the car candrive on 85 km/h ?
d) Lets assume thet the same friction force works on the carthat drives in a normal driving. How much gas will the car spend ona hundred ef the heat of reaction of the gas is 38 MJ/liters andthe efficiency is 21 %
Help please.

Answer & Explanation Solved by verified expert

3.8 Ratings (346 Votes)

Lets begin with the forces on the car without frictionWeight w Normal force Drawing the body free diagram we canobtain these movement equations using Second Law of NewtonLook that theres equilibrium on y axis but not on x axis Withx equation you can obtain acceleration so you can use kinematicsto obtain velocity at the bottom covering a See Answer

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