A car is rounding a circular curve of radius r on a banked turn. As the drawing indicates, there are two forces acting on the ca
r, its weight mg and the normal force FN exerted on it by the road. Which force, or force component, provides the centripetal force that keeps the car moving on the circular path?
1 answer:
Answer:
The centripetal force is provided by the x component of the Normal Force.
Explanation:
The centripetal force is a force that makes something to follow a cicular trayectory, this force is always oriented to the center of the circunferency-
So you can see in the image that i attached there is only two forces actting on the car, the normal force and the weigth, and as you can see the y component of the normal force cancels with the weigth, but the x component of the normal force (as it has nothing to cancel with) makes the car follow the circular trayectory so this is the centripetal force.
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To calculate the average speed of the car, we need
B. The total distance driven on the racetrack
Explanation:
The average speed of an object in motion is given by
where
d is the distance covered by the object
t is the time interval considered to calculate the speed
The SI units of the speed are metres per second (m/s).
In this problem, we know the time interval:
t = 30 s
Therefore, in order to find the average speed, by looking at the equation we see that we also need the total distance driven by the car, so the correct answer is
B. The total distance driven on the racetrack
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