Question

a car of mass M is moving horizontally on a circular path.At an instant its speed is v and is increasing at a rate a
A.The acceleration of the car is toward the centre of the path
B.The magnitude of the frictional force on the car is greater than mv^2/r
C.The friction coefficient between the ground and the car is not less than a/g

Answer 1

do you have any thoughts?!

Answer 2

what is your question.s yes in a circular path acceleration is always going to point in towards the center.

Answer 3

@a-higbee
you may have overlooked this, this is not a uniform circular motion.. i think she wants to know which of them is right

Answer 4

oh ok. sorry. let me re-look at the problem

Answer 5

this link should answer your question. http://www.physicsclassroom.com/Class/circles/U6L1c.cfm

Answer 6

yes of couse i want to know of the three whcih one is correct and make it a note dat it's a multi correct answer so pls...accordingly give the answer with explanation

Answer 7

I think the answer is B and C. Thus \[at = \sqrt{(ar)^2 + (al)^2}\]. \[Frictional Force = \mu* (m*g)=m*(at)\] thus \[\mu = (at)/g\]
\[(at > (al= a)) \therefore \mu > a/g\], also net force = frictional force(thats how vehicles move), net force = \[m*(at)\]

Answer 8

what is at here

Answer 9

mentioned in the figure, its total acceleration...the vector addition of ar (angular acceleration ) and al( linear acceleration)..