A 3 kg block is at rest on a horizontal floor. if you push horizontally on the 3.0 kg block with a force of 12.0 N,it just starts to move.
(a) What is the coefficient of static friction?
(B)A 7.0 kg block is stacked on top of the 3 kg block.What is the magnitude F of the force acting horizontally on the 3 kg block as before,that is required to make the two blocks start to move?
Please show working. I'm unsure of how to do this question
(a) What is the coefficient of static friction?
(B)A 7.0 kg block is stacked on top of the 3 kg block.What is the magnitude F of the force acting horizontally on the 3 kg block as before,that is required to make the two blocks start to move?
Please show working. I'm unsure of how to do this question
-
(a) coef. of friction say k = F_h/F_v = 12./3g = 4/9.8 = 0.408 (slip condition)
(b) F_h = k F_v = (7.0 + 3.0)/3.0 12N by proportions
= 40N
(or = W 0.408 = 10g 0.408 = 39.9N the same to 2sf)
(b) F_h = k F_v = (7.0 + 3.0)/3.0 12N by proportions
= 40N
(or = W 0.408 = 10g 0.408 = 39.9N the same to 2sf)