Question

There are four forces acting on the box: A spring pulls with a force of 40 N. The force of gravity acts downward; and the force of the table is pushing up on the box. What MUST be true of the frictional force if the box moves across the table?
A)
It is equal to the effort force.
B)
It is less than the effort force.
C)
It is more than the effort force.
D)
It is equal to the force of gravity.

Answer 1

http://www.usatestprep.com/modules/gallery/files/82/8289/8289.png

Answer 2

@iGreen could you help?

Answer 3

I'll give medal if you help Please!

Answer 4

Let me read it patience ^-^

Answer 5

if its moving and the frictional force is the opposite way.. we can infer...

Answer 6

Well before I go ahead and try to elaborate what do you think it would be?

Answer 7

And why that's also needed xD

Answer 8

I kinda think it's A.

Answer 9

Why's that?

Answer 10

if its a it would not be moving

Answer 11

^

Answer 12

Cause when you look at the picture it looks all equal

Answer 13

But as Austin stated if it were all equal then the box wouldn't move ^-^

Answer 14

True...

Answer 15

Sooo C?

Answer 16

Exactly!

Answer 17

Oh wait... it was B...

Answer 18

Oh xD now reading it does say frictional oops xD

Answer 19

Sorry i misread

Answer 20

It's okay

Answer 21

Well are you doing study island?

Answer 22

No

Answer 23

Hmmm

Answer 24

but i do do that aswell

Answer 25

Well how many questions do you have left?

Answer 26

I don't know... it's not 10 questions tho

Answer 27

I have another question also

Answer 28

Well open up a new question and I'll actually read over it thoroughly this time xD

Answer 29

Okay