Recent content by mslena79

a)Fs=\musFn Fn=F(cos40) Fs=(.560)(F(cos40)) Fs-mg+F(sin40)=0 F(0.560*cos(40)+sin(40))=88.9N F=82.9N b)-Fs-mg+F(sin(40))=0 F(sin(40)-(.560*cos(40))=88.9N F=415.4N answer for b doesn't seem right.

a) Fs acts up b)Fs acts down The problem is I'm not sure how to get Fs from the normal force in the x direction from the wall.

[bQuestion Details: I am having trouble answering this question. The drawing shows a block against a vertical wall to its right. The force F is pointed at the lower left hand corner of the block at 40.0 deg. left of -y-axis The weight of the block in the drawing is 88.9N. The...

No, I think I am having trouble because I am not sure where to place the applied force vector on my free body diagram. I have fs pointing +y, mg -y, Fn=-x, F 40 deg. in the (-x,-y)quadrant.

I don't understand.

a)88.9N*tan(40)=74.6N=Fn Fy=88.9N Fs=(0.560)*(74.6N)=41.8N 88.9N-41.8N=47.1N \sqrt{47.1^2+74.6^2}=88.2N F=88.2N

[b]1. There is a block parallel and touching a vertical wall, a force F is applied at a 40 deg. angle from -x,-y. the weight of the block is 88.9N. The coefficient of static friction between the block and the wall is 0.560. a) what is the minimum force F required to prevent the block from...

nevermind I got it.

ax is wrong?

Homework Statement Only two forces act on an object (mass=3.00kg). F1=60.0N 45.0deg above the +x axis, F2=40.0N on the +x axis. Find the magnitude and direction (relative to the x axis) of the acceleration of the object. Homework Equations F=ma, The Attempt at a Solution...

thanks, the textbooks never have examples like the ones you have to do in the homework, it makes it very difficult.

Oh, it is not clear from my text. So, (24.4m/s-18.6m/s=5.8m/s) 186m=(5.8m/s)t t=32.1s

for relative velocity, velocity of A with respect to B is Va+Vb=Vab (24.4m/s+18.6m/s=43.0m/s). 186m=(43.0 m/s)*t t=4.33s

Homework Statement Two cars, A and B, are traveling in the same direction, although car A is 186m behind car B. The speed of A is 24.4m/s, and the speed of B is 18.6m/s. how much time does it take for A to catch B? Homework Equations Va+Vb=Vab, x=1/2(V0x+Vx)t The Attempt at a...

sin(2theta)=.00492, can't remember how to get theta from here.