Question

someone please help!!:( meeee

Answer 1

ive tried four times and only have hour left and 3 tries left :((

Answer 2

The man is pushing at an angle, but the acceleration will only be in the x-direction. Thus, you must only calculate the forces applied in the x direction. The sum of the forces is thus the foce the man applies in the x direction minus the friction of the box. So, sum of Fx = 323cos(theta) - friction. And we know friction is equal to mass*uk.

Now, we know from Newton that F = ma, so lets set this equal to what we just found: m*a = 323cos(theta) - friction. Divide by the mass and you should have your answer.

Note: 323cos(theta) was found by Pythagorus' theorem where cos(theta) = adjacent leg/hypotenuse. Here we know that the force for the hypotenuse is 323. So, we use this to solve for the adjacent leg, which is the portion of x that is acting in the same direction of the acceleration and the friction: the x direction.