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Zigmanuir [339]
2 years ago
8

A machine has mechanical advantages 2, what does it means. plzz tell me the ans

Physics
1 answer:
Vlad [161]2 years ago
3 0

Answer:

Mechanical advantage is the measure of the force amplification achieved by using a tool , mechanical device or machine . ... So MA = 2 means that for example if you apply 100 N then your machine will multiply that force and generate 200 N..

Explanation:

Hope it helps you..

Your welcome in advance..

(ㆁωㆁ)

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A cell phone weighing 80 grams is flying through the air at 15 m/s. What’s is it’s kinetic energy
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Answer:

The kinetic energy of the cell phone is 9J

Explanation:

The kinetic energy is the energy possessed by a body by virtue of motion.

The kinetic energy is expressed as

KE= 1/2m(v)²

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Substituting our given data we have

KE= 1/2*0.08(15)²

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A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds. If acceleration due to gravity is 10ms-2, the power expended
Setler79 [48]

The power expended is 500 W

Explanation:

First of all, we start by calculating the work done by the man in order to ascend: this is equal to the gravitational potential energy gained by the man, which is

W=mg\Delta h

where

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\Delta h = 5 m is the change in height

Substituting,

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Now we can calculate the power expended, which is given by

P=\frac{W}{t}

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Substituting, we find

P=\frac{2500}{5}=500 W

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brainly.com/question/7956557

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