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Novay_Z [31]
3 years ago
13

A hydraulic press must be used to press-fit two components together in an assembly process. the system must generate at least 77

5 lb of force to perform the press fit. the piston at the input cylinder is pushed with a force of 250 lb and has an area of 30 in.2 . the output can use up to 15 cylinders that are each 30 in.2 . how many cylinders are needed?
Physics
1 answer:
Kobotan [32]3 years ago
8 0
The pressure generated by the piston at the input cylinder must be:

p = F / A = 250 lb-f / 30 in^2


The pressure generated by the piston at the output cylinders is p = F / A = 775 lb-f / A.


Pascal principle rules that both pressures are equal, so:


250 lb-f / 30 in^2 = 775 lb-f / A => A = 775 lb-f * 30 in^2 / 250 lb-f = 93 in^2


Gvien that each output cylinder are 30in^2 you need 93 / 30 = 3.1 cylinders.


Which means that at least you need 4 cylinders to generate a force at least of 775 lb-f.


Answer: 4
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(a) The moment of inertia of the wheel  is 78.2 kgm².

(b) The mass (in kg) of the wheel is 1,436.2 kg.

(c) The angular speed (in rad/s) of the wheel at the end of this time period is 3.376 rad/s.

<h3>Moment of inertia of the wheel</h3>

Apply principle of conservation of angular momentum;

Fr = Iα

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<h3>Mass of the wheel</h3>

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  • R is radius of the solid cylinder
  • I is moment of inertia of the solid cylinder

2I = MR²

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<h3>Angular speed of the wheel after 4 seconds</h3>

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Thus, the moment of inertia of the wheel  is 78.2 kgm².

The mass (in kg) of the wheel is 1,436.2 kg.

The angular speed (in rad/s) of the wheel at the end of this time period is 3.376 rad/s.

Learn more about moment of inertia here: brainly.com/question/14839816

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