A horizontal force of 12 N pushes a 0.5 Kg block against a vertical wall. The block is initially at rest, If static and kinetic coefficients are 0.6 and 0.8 respectively what is the friction force?
Basically the fbd has Force of 12 N across the x component(+) and the Normal force in the...
I am posed the following problem:
My work so far is this:
For part 1, we solve a system of equations:
F_net = M*a = T - F_fr
with F_fr the force of friction,
Torque_net = I*alpha = T*r + F_fr*R
since the torques from the tension and friction operate in the same direction, and
a =...
Why is the kinetic frictional force always less than the static?
One other question, when a car moves along a curved road, the direction of the static frictional force is toward the center. But we were told, since the elemantary school, that the frictional force is always at the opposite...
A 280 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 18.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 6.00 m.
(a) Find the work done by the pulling force.
1.60*10^3 J
(b)...
A 280 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 18.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 6.00 m.
(a) Find the work done by the pulling force.
1.60*10^3 J
(b)...
After seeing some of the problems that you are asking help on, i feel really stupid, since mine seem so simple compared to yours. but here it is anyway
I am really having trouble with Friction here, how exactly do u get the coefficient of kinetic friction? I have 2 problems here:
1)A box...
Im doing a problem with variable frictional forces.
My main equation is -mkv^2=F . We are to assume the force driving the object remains constant, kinda like a boat on the lake full bore.
So, I set my F=ma equation up.
-mkv^2=m(dv/dt)
Next I removed m and inverted both equations to...
I have a question regarding frictional force, and how it is related to a contact area.
Last week our professor mentioned that the frictional force between an object and a surface is independant of the surface area in contact.
If this is true, then why do vehicles in motorsports want to...
There's a disagreement going on in my department regarding whether the static frictional force does any work. My argument rests on the fact that static friction has zero displacement, hence zero work.
The other side gives the example of a system consisting of a block on a piece of paper...