Fun physics question

[TheSiege]

I am trying to figure out how much force needed to push something up a ramp

the first ramp is 156 in long (adjacent) and 12 in high (opposite), so using TAN-1 I came up with about 4.4 degrees

the second ramp is 122 in long and 8 in high and I came up with 3.74 degrees

I am wondering how much force it would take to move an object 3500lbs up each ramp...

 

[GagHalfrunt]

Impossible to determine with information provided. Fun not found. I demand a refund.

 

[TheSiege]

Impossible to determine with information provided. Fun not found. I demand a refund.

What other information do you need?

 

[GagHalfrunt]

What other information do you need?

Coefficient of friction of object vs ramp. Or rolling resistance of tires if said object is on wheels.

 

[TheSiege]

Coefficient of friction of object vs ramp. Or rolling resistance of tires if said object is on wheels.

its on wheels, I am not sure, but it should be the same for both, I am just wondering the relative difference in force if using one ramp as opposed to the other.

 

[benzylic]

Have fun!

Resolve equation for F(app)

http://faculty.wwu.edu/vawter/PhysicsNet/Topics/Dynamics/InclinePlanePhys.html

Edit: The length of the ramp doesnt matter, and I hope it should be obvious that a steeper ramp will require more force.

 

[FuzzyDunlop]

what the fuck is this? A 10th Grade physics lesson?

 

[SSSnail]

Do your own homework.

 

[Matthiasa]

Without added information, having to assume frictionless vacuum where the box is probably actually either a sphere or a singularity, the difference would be...

Do your own HW.

 

[MongGrel]

Do your own homework.

:biggrin:

 

[TheSiege]

Its not homework, I am trying to convince my employer to purchase a different ramp and they are worried it will be too much force with the higher angle.

 

[GasX]

It's still homework, only you are getting paid to figure it out...

 

[Lifted]

Do the wheels have ball bearings or bushings?

 

[TheSiege]

All I see is a bunch of people who dont know how to answer the question and instead of admitting that, they just want to throw ill conceived jabs at the OP

 

[TheSiege]

Do the wheels have ball bearings or bushings?

Casters, its a data rack filled with servers. about 44U

 

[Lifted]

Casters, its a data rack filled with servers. about 44U

Do the casters use bearings or bushings?

And whatever you do, don't use a chair!

 

[Cattlegod]

the object takes off

 

[TheSiege]

Do the casters use bearings or bushings?

And whatever you do, don't use a chair!

bearings

 

[Lifted]

bearings

Bearings are going to be pretty tough to figure out with a fully populated rack on them.

 

[Matthiasa]

Okay you want a real answer.
Assuming the ramps would be for the same use they would be required to the same height.
If they are the wrong height discard that option immediately, given they are different heights that means at most only one is an option, pick it.


If they are the same height of the same material the one with a shallower angle would required less force to move it but more total work would be done as nothing is frictionless.
If frictionless the work would be the same.

 

[Fenixgoon]

assuming the block is on the incline ramp,

1) to get the block moving, the required force is

Fmax = uFN = u*mg*sin(theta) = 1*mg*sin(theta)

2) the work you do is equal to F*d, and the force required would also depend on how quickly you'd like to accomplish that (power = force*velocity)

 

[darkswordsman17]

Its not homework, I am trying to convince my employer to purchase a different ramp and they are worried it will be too much force with the higher angle.

Casters, its a data rack filled with servers. about 44U

Why the fuck does force matter for this? They probably gave you that reasoning as a way of saying "we don't want to bother and/or spend the money, please fuck off" but you're apparently too much of a Big Bang Theory caricature to realize it.

 

[SSSnail]

Here's a much more simplified answer - buy a winch.

 

[Sluggo]

Casters, its a data rack filled with servers. about 44U

I estimate it takes 4 guys who lift, do you even lift?

 

[mikeford]

Force won't be the issue of concern.