Question

Which force represents friction? DIAGRAM BELOW

Answer 1

What do you know about friction?

Answer 2

it's slows down kinetic energy

Answer 3

b

Answer 4

thank you (:

Answer 5

no pob

Answer 6

which force represents the normal force ?

Answer 7

how?

Answer 8

my guess is C due to gravitational energy pushing the mass of the box down the incline

Answer 9

well ya that two ;)

Answer 10

Incorrect on both counts, sorry. A is the normal force, B is weight (gravity) and C is friction.

The normal force refers to it being "normal" (think perpendicular, in three dimensions) to the slope. This is the force of the slope pushing up against the box.

Weight is simply the force due to gravity, thus should be fairly obvious.

Friction opposes any velocity that is there or could be there. Considering the other two forces, the resultant of these forces would be down and to the right, ie the box will slide down the slope (which should be intuitively obvious), and the friction here is opposing that.

Answer 11

oo ok ya I get it

Answer 12

thanks for the explaination (: