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3 years ago

What is friction and its types?

Physics

2 answers:

Kitty [74]3 years ago

3 0

jeka57 [31]3 years ago

3 0

Answer:

Friction is defined as the force that opposes the motion of a solid object over another. There are mainly four types of friction: static friction, sliding friction, rolling friction, and fluid friction. Friction and normal force are directly proportional to the contacting surfaces and it doesn’t depend on the hardness of the contacting surface. With the increase in relative speeds, the sliding friction reduces whereas fluid friction increases with the increase in the relative speed, also fluid friction is dependent on the viscosity of the fluid.

In sliding motion, each point on the body has only translational or linear motion. But in case of rolling motion, different points have a combination of linear as well as rotational motion.

Types Of Friction

Static Friction

Sliding Friction

Rolling Friction

Fluid Friction

Static Friction

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frosja888 [35]

Answer:

a) The schematic illustrating is attached

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Explanation:

b) The heat transfer to the engine and the heat transfer from the engine to the air is:

$Q_{1} =\frac{W}{n}$

Where

W = 750 kJ

n = 35% = 0.25

Replacing:

$Q_{1} =\frac{750}{0.35} =2142.86kJ$

$Q_{2} =Q_{1} -W=2142.86-750=1392.86kJ$

c) The efficiency of Carnot engine is:

$n=1-\frac{300K}{550K} =0.455$

The heat transfer to the heat engine is:

$Q_{1c} =\frac{750}{0.455} =1648.35kJ$

The heat transfer from the heat engine is:

$Q_{2c} =1648.35-750=898.35kJ$

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3 years ago

The scanner records the time from when a ultrasound wave is emitted to when its reflection is received

telo118 [61]

Explanation:

The scanner records the time from when a ultrasound wave is emitted to when its reflection is received. A technician calculates the depth of the reflection using the equation as :

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3 years ago

two forces equal in magnitude and opposite in direction act at the same point on an object. is it possible for there to be a net

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3 years ago

Two cars are traveling at the same constant speed v. Car A is moving along a straight section of the road, while B is rounding a

Kamila [148]

Answer:

Car A is not accelerating, but car B is accelerating

Explanation:

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4 years ago

Two cars are traveling around identical circular racetracks. Car A travels at a constant speed of 20 m/s. Car B starts at rest a

Tomtit [17]

Answer:

b. it has the same centripetal acceleration as car A.

Explanation:

According to the question, the data provided is as follows

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As we know that

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$= \frac{V^2}{r}$

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hence, the second option is correct

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4 years ago

What is friction and its types? ​

What is friction and its types?