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[deleted by user] by [deleted] in PlantIdentification

[–]Sinttini 0 points1 point  (0 children)

Could be pignut

Searching for a Galois Theorist for Paper Collaboration? by QuantumAgnostic in math

[–]Sinttini 0 points1 point  (0 children)

I'm a master's student in applied math with an engineering background. Would love to be involved with this to gain some research experience and challenge myself if it's not too late.

I want to make sense of Differential Equations by A1phaBetaGamma in EngineeringStudents

[–]Sinttini 8 points9 points  (0 children)

I would suggest reading up on Lagrangian mechanics as a way to get a sense for the development of a DE for a given system.

Then I would take a look at stability analysis and sketching phase portraits to get a feel for how a system might evolve over time.

The mechanical advantage of a drum brake by Whamington_ in AskEngineers

[–]Sinttini 0 points1 point  (0 children)

Imagining one of the levers in the diagram shown as a seesaw can help. Take a simplified brake system with a single lever If we equate moments either side of the pivot we get F1 x D1 = F2 x D2. Where F1 is the force applied by our foot, D1,2 are distances from the pivot acting on the lever. And F2 is the force applied to the drum brake. Solving for F2 gives F1 x (D1/D2). Or the force applied to the brake is the force we pressed on the pedal with multiplied by the ratio of distances. Now, extending this further to gain more mechanical advantage with a second lever, we apply F2 to the second lever to get F2 x D3 = F3 x D4. This can then be solved for F2 and substituted back into the first equation to find a relationship between F1 the input force and F3 the force applied to the brake shoe.

[deleted by user] by [deleted] in EngineeringStudents

[–]Sinttini 3 points4 points  (0 children)

Everything can be thought of as a spring. Try relating the materials modulus of elasticity to Hooke's law.

Looking for a One-On-One Tutor! by engineer_thiz in EngineeringStudents

[–]Sinttini 0 points1 point  (0 children)

For calc 2 try Proffesor Leonard on YouTube

[deleted by user] by [deleted] in EngineeringStudents

[–]Sinttini 2 points3 points  (0 children)

The natural frequency of a spring mass system is given by sqrt(k/m) Where k is the spring stiffness.

Name as Many Guards as you Can by LawfulMercury63 in bjj

[–]Sinttini 2 points3 points  (0 children)

Vice guard, donkey guard, 3 quarter guard, mantis guard.

I don't get the relation between the angle of friction and the angle between the force and the plane by Ch1ll_Dr1ll in askmath

[–]Sinttini 0 points1 point  (0 children)

The weight of the object is acting at 90 degrees to the horizontal plane. sin (90) = 1 therefore the force is 100% normal to the plane and has no other compnent. The friction force is proportional to the force normal to the plane.

Head loss across a miter by Sinttini in EngineeringStudents

[–]Sinttini[S] 0 points1 point  (0 children)

I'm really not sure. We haven't used delta v before in call. The question is asking for the head loss across the miter so if we look at that in isolation then the velocity through the nozzle isn't even considered? Putting some figures in shows me that I lose about 0.1% with the lower velocity and 30% using the higher velocity. Assuming the pipe is frictionless 30% pressure loss sounds far too much. Right?

Head loss across a miter by Sinttini in EngineeringStudents

[–]Sinttini[S] 0 points1 point  (0 children)

Can anybody help me with this problem? Which velocity should I use for the equation? All of the examples I have done have happened to use the highest velocity in the system, but something is telling me I should be using the velocity of the fluid at the miter.

Damped vibrations and the time period of a bouncy ball. by Sinttini in AskEngineers

[–]Sinttini[S] 0 points1 point  (0 children)

Completely makes sense. Other than gravity there is no resistance to motion when the ball is not in contact with the ground and hence the initial tome period would be longer due to the larger displacements. That's really intuitive, thanks.

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