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2 years ago

List 3 to 5 ways to reduce friction

2 answers:

8 0

Make the surfaces smoother. Rough surfaces produce more friction and smooth surfaces reduce friction
Lubrication is another way to make a surface smoother
Make the object more streamlined
Reduce the forces acting on the surfaces
Reduce the contact between the surfaces.

svp [43]2 years ago

5 0

1.Make the surfaces smoother. Rough surfaces produce more friction and 2.smooth surfaces reduce friction.

3.Lubrication is another way to make a surface smoother.

4.Make the object more streamlined

5.Reduce the forces acting on the surfaces.

6.Reduce the contact between the surfaces.

hope this helps ;)

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Answer:

$f_n=3.75N$

Explanation:

From the question we are told that:

Frictional force $F=0.150N$

Coefficient of kinetic friction $\mu=0.04$

Generally the equation for Normal for is mathematically given by

$f_n=\frac{F}{\mu}$

Therefore

$f_n=\frac{0.150}{0.04}$

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2 years ago

Thermometer is preferred fir very cold region give reason

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Answer:

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2 years ago

An iron railroad rail is 700 ft long when the temperature is 30°C. What is its length when the temperature is – 10°C?

MAVERICK [17]

Answer:

699.67ft

Explanation:

We are given with,

α = 1.2×10⁻⁵ / °C
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ΔT = -10°C − 30°C = -40°C

Now, We have to find ΔL:

ΔL = (1.2×10⁻⁵ / °C) (700 ft) (-40°C)
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Rounded to two significant figures, the change in length is −0.33ft.

Therefore, the final length is approximately 700 ft − 0.33 ft = 699.67ft.

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Answer:

See the explanation below

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