Recent content by mooney82

I got it to work out. You tha man Al!

Would you then solve by substitution? I'm having a hard time because F seems to cancel out.

Well, I summed the x component forces: Fcos45 - friction = ma acceleration = 0 friction = uk(N) N equals mg so Fcos45 - uk(mg)=0 F = uk(mg)/cos45 F = 0.25*1.8*9.81/cos45

Homework Statement A 1.8kg block is moved at constant speed over a surface for which uk = 0.25. The displacement is 2 m. It is pushed with a force at 45 degrees below the horizontal. Find the work done by: (a) the force F; (b) friction; (c) gravity Homework Equations W=Fs cos (theta)...

Ya, I think so. I'll try it tomorrow, thanks a lot!

But without the mass you can't find out the acceleration due to gravity. Without the force you can't find the mass.

Homework Statement The minimum stopping distance for a car from an initial 100km/h is 60 m on level ground. What is the stopping distance when it moves (a) down a 10 degree incline; (b) up a 10 degree incline? Assume the initial speed and the surface are unchanged. Homework Equations...

Homework Statement Block A (M1-5 kg) is on a horizontal surface and block B (M2-2 kg)to the left resting on a 30 degree incline. the two are connected to each other by a mass-less rope over a massless pulley and are moving down hill (to the left) at constant velocity. a) Find the...

Ahhh I get it, you see the only example my professor gave in class was with an outside force pushing at an object, here there isn't any other force besides her weight, or mg pointing straight down! Thanks, my professor sucks at explaining things, thank you very much!

Ok, so does the force from the girl start parallel to the ground or the incline? I think that is where I might be getting it wrong. I've been setting it parallel to the ground.

But if i set the x-axis on the incline wouldn't the x component be the adjacent side?

So the weight is just m*g, which is 294.3 N? The x component of mg would be 294.3cos10?

Homework Statement A 30-kg child on roller skates starts up a 10 degree incline at 15 km/h. Assuming she does not propel herself how far up the incline does she travel before stopping? Ignore frictional losses. Homework Equations F=ma W=mg The Attempt at a Solution I can do...