- #1
Cromptu
- 33
- 0
Hello! I have a few doubts in circular motion and I'd really appreciate your help :)
1) There is a statement in my book ( I have attached images - the first one) according to which the only horizontal force towards the center on the vehicle is friction. I know that some centripetal force is necessary for the vehicle to move in a circle..but why friction? Friction opposes motion, yes, but if there is no friction, the body will move in the direction of its velocity which is tangential. So why isn't friction opposite to the direction of the velocity? Why is the direction of friction towards the center? Also, it is mentioned that static friction acts on the vehicle. But why static friction..if the body is moving? :/
2) The second image that I have attached describes the motion of a vehicle when the road is banked at an angle θ. But it says that the frictional force keeps the value of horizontal component of Normal force zero.What do they mean by this? Does friction balance this horizontal component? IF it does, why will there be an acceleration towards the center? And they haven't even shown the force of friction in the FBD..I am really very confused :/
- I have marked the lines with an *
1) There is a statement in my book ( I have attached images - the first one) according to which the only horizontal force towards the center on the vehicle is friction. I know that some centripetal force is necessary for the vehicle to move in a circle..but why friction? Friction opposes motion, yes, but if there is no friction, the body will move in the direction of its velocity which is tangential. So why isn't friction opposite to the direction of the velocity? Why is the direction of friction towards the center? Also, it is mentioned that static friction acts on the vehicle. But why static friction..if the body is moving? :/
2) The second image that I have attached describes the motion of a vehicle when the road is banked at an angle θ. But it says that the frictional force keeps the value of horizontal component of Normal force zero.What do they mean by this? Does friction balance this horizontal component? IF it does, why will there be an acceleration towards the center? And they haven't even shown the force of friction in the FBD..I am really very confused :/
- I have marked the lines with an *