Banked Curve Physics - Uniform Circular Motion

Dr. E. looks at the banked curve problem in physics. We consider a car going around a curve at constant speed and calculate how fast they can safely negotiate the bend. This is an AP physics problem dealing with uniform circular motion. We look at a numerical example using data from Talladega Racetrack

[Professional_NERD]

I'm 16 year old physics enthusiast, and I wanted to know how to imagine the forces here cuz I was getting stuck there and you cleared it, I'm really good at mathematics so I was able to do the math by myself thanks

[emmanueldonkor]

*In a ballistic test, a 25g bullet travelling horizontally at 1200m/s pass through a 30cm thick, 350kg stationary target and emerges with a speed of 900m/s. The target slides without friction on a smooth horizontal surface.*
I) Calculate the average force(Favg), that the bullet exerts on the target.
II) Calculate the target's speed after the bullet emerges.

[tirthshah]

Thank you for the explanation. I have a doubt regarding the Normal Force component. In inclined plane problems we use mgcos(ß)=N but in uniform circular motion, we use Ncos(ß)=mg. Why is it so? Can you please give a physical explanation for the concept?

[pia]

cleared a lot of things for me. thanks!

[gooddeedsleadto]

Does the friction force where the rubber meets the road acts radially inward to counter the tangential velocity on the car moving in a circular motion?

[ruzainiahmedh]

in an inclined plane, there is gravitational acceleration towards the inclined plane nah.but here you did not mark that force.can you please explain me.iam stuck in that position.thanks

[J.Michael]

Thanks! Very helpful! New subscriber here.

[jactinta]

I thought you would have to use Pythagoras to find the normal force, I didn't realise you can just add components to get the resultant vector?

[bilalshakeel]

for the forces in the x-direction, why is Nsin not negative?

[suhanipatni]

i dont get how you can get angle theta in the triangle

[lisandrolisandro]

why is there no angles for the force of gravity?

[petergoh]

Hi, does that mean that at 90 degrees you can go infinitely fast?

[laylae]

is the final answer the minimum speed?

[muhammadasim]

Why at y co coordinate use cos and on x coordinate use sin?