Lifting a crate magnitude of forces.

[physicsgurl12]

Homework Statement

a woman is straining to lift a large crate with no sucess. its too heavy. we denote the forces on the crate as follows: P is the upward force on the crate by the person. C is the contact force on the crate by the floor and w is the weight. how are the magnitudes related while the person is unsucessfully trying to lift the crate.
P+C>W
P=C
P+C=W

Homework Equations

none??

The Attempt at a Solution

im guessing its not the second one because weight isn't even in that equation

 

[SammyS]

The problem statement appears to be garbled.

What is the problem supposed to say?

 

[physicsgurl12]

i fixed it.

 

[SammyS]

Homework Statement

a woman is straining to lift a large crate with no success. its too heavy. we denote the forces on the crate as follows: P is the upward force on the crate by the person. C is the contact force on the crate by the floor and w is the weight. how are the magnitudes related while the person is unsuccessfully trying to lift the crate.
P+C>W
P=C
P+C=W

Homework Equations

none??

The Attempt at a Solution

im guessing its not the second one because weight isn't even in that equation

I'm guessing that to be successful in your physics course you will need to do more than guess.

Why or why not: P+C>W ?

Why or why not: P=C ?

Why or why not: P+C=W ?

 

[physicsgurl12]

haha. well not the first one because the force of the woman pulling up plus the floor pushing up can't be greater than the weight or she could lift it.
not the second one because the forces go in the same direction

 

[SammyS]

Actually it could be that P = C.

Why or why not: P+C=W ?

 

[physicsgurl12]

um i guess if P+C=W the crate would be still. Because the forces equal the weight? so it could be this one

 

[SammyS]

um i guess if P+C=W the crate would be still. Because the forces equal the weight? so it could be this one

It could be this one, but likely it's like the first one, but with the > flipped to < .

 

[physicsgurl12]

its not. that's what i had the first time and it was wrong. You can't flip it.

 

[SammyS]

I can. Probably you can't.

 

[physicsgurl12]

haha