2 years ago

What is velocity ratio? It is impossible to get a perfect machine in practical life, why?

1 answer:

6 0

Explanation:

<h3>VELOCITY RATIO :- The ratio of a distance through which any part of a machine moves to that which the driving part moves during the same time.</h3>

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A block of mass 57.1 kg rests on a slope having an angle of elevation of 28.3°. If pushing downhill on the block with a force ju

stira [4]

Answer:

The coefficient is 0.90

Explanation:

Drawing a diagram makes thing easier, we will assume that the acceleration tends to zero because it start barely moving.

$-F_s+mg*sin(\theta)+F=0\\F_s=57.1kg*9.8m/s^2*sin(28.3)+177N\\F_s=442N\\F_s=\µ*N\\N=m*g*cos(\theta)\\N=57.1*9.8*cos(28.3)=493N\\\\\µ=\frac{442N}{493N}=0.90$

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2 years ago

Which of these factors best explains why liquid water exists on earth ?

Sveta_85 [38]

Answer:

earth strong gravity

Explanation:

The only planet that have water bodies is earth. We know that water is one of the important factors for all living organism. Liquid water exists on the earth's surface is due to the atmospheric pressure. The reason behind this is not completely mentioned.

There are so many hypothesis about it. Out of given options the correct option is earth's strong gravity.

Hence, the correct option is (b) " earth strong gravity ".

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2 years ago

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Which element is most likely to carry electric current easily

Stella [2.4K]

Are there choices?? i dont see any

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2 years ago

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The pressure of a gas produces a net force (the sum of all the forces) at ____ angles to the wall of a container.