Question

A coin is placed on a horizontal phonograph turntable. Let N be the magnitude of the normal force
exerted by the turntable on the coin, f be the magnitude of the frictional force exerted by the turntable
on the coin, and f be the maximum possible magnitude force of static friction. The angular speed of
the turntable is increased in small steps. If the coin does not slide, then
(A) N increases, f increases, and f
(B) N increases, f increases, and increases
Smax stays the same
(C)f increases and both N and f,
stay the same
max
(D) N. f. and f
Smax
all increase​

Answer 1

Answer:

Because when velocity increases centripetal force increases frictional force provides the necessary centripetal force and hence frictional force must increase for centripetal force to increase .

The maximum static frictional force remains constant irrespective of this increase in velocity since normal reaction is constant(weight of the coin).

Explanation:

Step 1: The force of static friction between the coin and the turntable, which exists when the coin and turntable are at rest with respect to each other, produces the centripetal acceleration.

Step 2: The coefficient of friction (fr) is a number that is the ratio of the resistive force of friction (Fr) divided by the normal or perpendicular force (N) pushing the objects together. It is represented by the equation: fr = Fr/N.

Step 3: The value is often between 0 and 1, although it can also be higher. A number of 0 indicates that there is absolutely no friction between the items; superfluidity makes this feasible. Otherwise, there will be some friction when items come in contact. The frictional force is equal to the normal force when the value is 1.

Learn more about similar questions visit:

https://brainly.in/question/654462?referrer=searchResults

https://brainly.in/question/28631232?referrer=searchResults

#SPJ1