i dont usually post on here but i need physics help

[chriscalandro 0]

and i know some of you are good at physics.

i just cant seem to wrap my head around these two questions.

a man sits in a 21kg wheelchair
the chair accelerates at .4m/s down the ramp
if the net force on the wheelchair is 40n what is that man in the wheelchairs mass

[labrys 0]

that's only 1 question and mass is a constant.

Owned by Remi #?

[monkycndo 0]

We don't have all the needed info.

Is he in a vacuum?

What did he have for lunch?

If not in a vacuum, does he have a head wind or tail wind?

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[chriscalandro 0]

the other one is a 14n object hits a 200 n object
the static friction is .06
the dynamic friction is .05
what is the horizontal acceleration

[chriscalandro 0]

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We don't have all the needed info.

Is he in a vacuum?

What did he have for lunch?

If not in a vacuum, does he have a head wind or tail wind?

no wind and 9.8 as gravity

[labrys 0]

42

Owned by Remi #?

[quade 3]

Quote

the chair accelerates at .4m/s down the ramp

Accelerates AT or TO? If it is AT, then I need to know how long the ramp is so I can calculate how fast he was going at the bottom of it or alternatively, how many seconds he was allowed to accelerate.

quade -
The World's Most Boring Skydiver

[chriscalandro 0]

he is accelerating at the rate of .4m/s

[labrys 0]

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Accelerates AT or TO? If it is AT, then I need to know how long the ramp is so I can calculate how fast he was going at the bottom of it or alternatively, how many seconds he was allowed to accelerate.

Well.... he's clearly accelerating long enough to reach the speed of light, which causes his mass to change....

Owned by Remi #?

[chriscalandro 0]

heres the question (its my homework)

a man sits in a 21kg wheelchair at the top of a short ramp. when the brakes on the wheelchair are suddenly released the wheelchair begins to roll down the ramp accelerating at a rate of 0.3m/s^2. if the net force that causes the wheelchair to roll down the ramp is 40N what is the mass of the man in the wheelchair

i wanted to take a class on dinosaurs but instead got put in this stupid biomech class

[mrubin 0]

a man sits in a 21kg wheelchair
the chair accelerates at .4m/s down the ramp
if the net force on the wheelchair is 40n what is that man in the wheelchairs mass

[labrys 0]

force = mass * acceleration.

Owned by Remi #?

[monkycndo 0]

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i wanted to take a class on dinosaurs but instead got put in this stupid biomech class

So what you are trying to tell us is that you are actually attracted to purple stuffed dinosaurs but are afraid to admit it?

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[quade 3]

edited to add

GOOD GOD can you see where those are completely different questions?!?

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The World's Most Boring Skydiver

[monkycndo 0]

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Quote

he is accelerating at the rate of .4m/s

Ok, got it . . . deceleration = acceleration.

F=ma.

So a very small bit of algebra is required.

m=F/a

20/.4=50

50-21 (the mass of the wheelchair) = 29kg (the weight of the object)

Unless I'm missing something.

You didn't include what he had for lunch.

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[chriscalandro 0]

cool
i just figured it out as you posted that.

but i still cant figure out the collision one...

[labrys 0]

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Unless I'm missing something.

Where did you get the 20 and why are you doing his homework?

Owned by Remi #?

[quade 3]

Quote

heres the question (its my homework)

a man sits in a 21kg wheelchair at the top of a short ramp. when the brakes on the wheelchair are suddenly released the wheelchair begins to roll down the ramp accelerating at a rate of 0.3m/s^2. if the net force that causes the wheelchair to roll down the ramp is 40N what is the mass of the man in the wheelchair

i wanted to take a class on dinosaurs but instead got put in this stupid biomech class

OK, FFS, when you ask a person for help with a question . . . ASK THE RIGHT F'IN' QUESTION TO BEGIN WITH.

That's it . . . I'm out.

quade -
The World's Most Boring Skydiver

[quade 3]

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Quote

Unless I'm missing something.

Where did you get the 20 and why are you doing his homework?

My mistake . . . it should have been 40 but I'm out of here in any case.

quade -
The World's Most Boring Skydiver

[chriscalandro 0]

yeah, i used 40.

i forgot my formula sheet and my internet seems to be blocking any type of search for some reason....

thanks a lot

biomechanics has absolutely nothing to do with my major, and i am terrible at math. this class was a bad choice

[labrys 0]

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i forgot my formula sheet and my internet seems to be blocking any type of search for some reason....

your dog ate your search engine?

Owned by Remi #?

[akarunway 1]

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edited to add

GOOD GOD can you see where those are completely different questions?!?

I have a test tomorrow. Help me too. What is the min. distance you can have a const. crane from a 240 kv powerline?

I hold it true, whate'er befall;
I feel it, when I sorrow most;
'Tis better to have loved and lost
Than never to have loved at all.

[chriscalandro 0]

that depends on how shitty you want your insides to feel

[kallend 1,679]

Quote

yeah, i used 40.

i forgot my formula sheet and my internet seems to be blocking any type of search for some reason....

thanks a lot

biomechanics has absolutely nothing to do with my major, and i am terrible at math. this class was a bad choice

Physics isn't math. Math isn't physics.

...

The only sure way to survive a canopy collision is not to have one.

[shropshire 0]

0.3 or 0.4 m/s^2 - what's it to be

and it mathS/

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Chivalry is not dead; it only sleeps for want of work to do. - Jerome K Jerome