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mgjimenez1
 3 years ago
A 600kg car is going over a curve with a radius of 120 meters that is banked at an angle of 25 degrees with a speed of 30 meters per second. The coefficient of static friction between the car and the road is 0.3. What is the normal force exerted by the road on the car? a) 7240 N b) 1590 N c) 5330 N d) 3430 N e) 3620 N
mgjimenez1
 3 years ago
A 600kg car is going over a curve with a radius of 120 meters that is banked at an angle of 25 degrees with a speed of 30 meters per second. The coefficient of static friction between the car and the road is 0.3. What is the normal force exerted by the road on the car? a) 7240 N b) 1590 N c) 5330 N d) 3430 N e) 3620 N

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VincentLyon.Fr
 3 years ago
Best ResponseYou've already chosen the best response.0First thing to do is draw a freebody diagram of the situation.

jufetluz
 3 years ago
Best ResponseYou've already chosen the best response.0you can use the formula tan (theta) = v²/gR where theta is your angle, v is your velocity, g the acceleration due to gravity and R your radius

VincentLyon.Fr
 3 years ago
Best ResponseYou've already chosen the best response.0This formula will give you the velocity for which friction is zero, but it will not provide an answer to the question.

viniterranova
 3 years ago
Best ResponseYou've already chosen the best response.0What´s is the value for G force?

viniterranova
 3 years ago
Best ResponseYou've already chosen the best response.0Try to use the Diagram for solve the problem.

viniterranova
 3 years ago
Best ResponseYou've already chosen the best response.0Here is the answer.

VincentLyon.Fr
 3 years ago
Best ResponseYou've already chosen the best response.0@Dikawar You went right, but it is even easier to project along the normal of the road:  only one projection needed  no system to solve for N, as f does not appear in the equation.

VincentLyon.Fr
 3 years ago
Best ResponseYou've already chosen the best response.0@Dikawar Have a look at the solution I wrote here (you'll have to scroll down to the one with the drawing): http://openstudy.com/study?version=feed:joinstudygroup&referrer=mit%208.01%20physics%20i%20classical%20mechanics,%20fall%201999&domain=ocw.mit.edu#/updates/50bc2ea4e4b0bcefefa06b4d

VincentLyon.Fr
 3 years ago
Best ResponseYou've already chosen the best response.0*sorry @Diwakar

Diwakar
 3 years ago
Best ResponseYou've already chosen the best response.0@VincentLyon.Fr Thanks! Your method is much better and easier .
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