Question

Calculate the force of friction for a 5kg aluminum block being pulled with constant velocity (uniform motion) across a horizontal steel plank.

Answer 1

You need the coefficient of kinetic friction between steel and aluminum. Then multiply that value by the normal force acting on the block.

Answer 2

the coefficient between steel and aluminum is 0.47. but I also need to multiply the 5kg by 9.8m/s^2 to get the normal force right?

Answer 3

Yes

Answer 4

so it would be (0.47)(5*9.8) and that would be the answer, right?

Answer 5

Yes, it would.

Answer 6

k thanks, now I need help on my other two questions, one is similar to this one, but I'm confused.