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3 years ago

The lower the value of the coefficient of friction,the_the resistance to sliding

Physics

1 answer:

malfutka [58]3 years ago

7 0

Answer:

lower

Explanation:

The lower the value of the coefficient of friction, the lower the resistance to sliding.

The coefficient of friction is the ratio of the frictional force and the normal force pressing two surfaces in contact together.

U = $\frac{F}{N}$

U is the coefficient of friction

F is the frictional force

N is the normal force

We see that coefficient of friction is directly proportional to frictional force.

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2 years ago

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Answer:

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2 years ago

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2 years ago

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3 years ago

A compact disc (CD) is played by a cd player, which uses a laser to read the tracks on the disc. The disc spins initially at app

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a. The laser tracking mechanism experiences a changing tangential velocity

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Explanation:

a. The laser tracking mechanism experiences a changing tangential velocity

This is because the tangential velocity v = rω where r = radius of disc and ω = angular speed of discs. Since r is constant, v ∝ ω.

Since the angular speed changes from 200 rpm to 500 rpm, thus, the tangential velocity would also change.

So, the laser tracking mechanism experiences a changing tangential velocity

c. The laser tracking mechanism experiences a non-zero angular acceleration

Since angular acceleration, α = Δω/Δt where Δω = change in angular speed and Δt = change in time.

Since there is a change in angular speed from 200 rpm to 500 rpm in time Δt, there is thus a non-zero angular acceleration.

So, The laser tracking mechanism experiences a non-zero angular acceleration

d. The laser tracking mechanism experiences a non-zero tangential acceleration

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Since there is an angular acceleration of the disc, there is thus going to be a tangential acceleration given by a = rα.

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Statement b is false because, the disc experiences a changing angular speed from 200 rpm to 500 rpm.

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2 years ago

The lower the value of the coefficient of friction,the_the resistance to sliding​

The lower the value of the coefficient of friction,the_the resistance to sliding