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3 years ago

Which of the following helps to explain how hydraulic lifts work?

Physics

2 answers:

Gnesinka [82]3 years ago

8 0

Answer : C. Pascal's principle.

Explaination : Pascal's principle (well-known as Pascal's law) states that if a closed container contains a fluid at rest, then a small change in pressure at one side of the fluid is transmitted to each and every part of the fluid and also to the walls of the container without any loss. In a hydraulic lift, we need the same mechanism to work and so we take the help of Pascal's principle.

Hence, the correct option is C. Pascal's principle.

FromTheMoon [43]3 years ago

6 0

Answer:

Correct answer is C

Explanation:

Defination of Hydrollic lift:

A hydraulic lift is an example of multiplication of force by hydraulic press, A multiplication of force can be achieved by the application of fluid pressure according to Pascal's principle.

Pascal's principal:

According to Pascal's principle in a fluid inside a closed container, a pressure change in one part of fluid is transmitted without loss to every portion of the fluid and to the walls of the container.

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Vladimir [108]

Answer:

1470 W

Explanation:

Power: This can be defined as the rate at which work is done or energy is used up. The S.I unit of power is Watt (W).

The expression for power is given as,

P = Energy/time

P = mgh/t ...................... Equation 1

Where P = power, m = mass, h = height, t = time, g = acceleration due to gravity.

Given: m = 75 kg, g =9.8 m/s², h = 1 m, t = 1 s.

Substitute into equation 1

P = (75×1×9.8)/1

P = 735 W.

From the above,

1 hp = 735 W

2 hp = (2×735) W

2 hp = 1470 W.

Hence 2 hp = 1470 W

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