The three diagrams below show a block of mass m being pulled or pushed at consta

Question

The three diagrams below show a block of mass m being pulled or pushed at constant acceleration ax along a table with a force P. The coefficient of kinetic friction is ?k. What is the friction force in each case? Give your answer in terms of the pushing force P, ax, m, and the angle ?.

case (i)     fk = case (ii)     fk = case (iii)     fk = The three diagrams below show a block of mass m being pulled or pushed at constant acceleration ax along a table with a force P. The coefficient of kinetic friction is ?k. What is the friction force in each case? Give your answer in terms of the pushing force P, ax, m, and the angle ?.

Explanation / Answer

i. P - f =ma

f = P-ma

ii. Pcos? - f = ma

f = Pcos? - ma

ii. Pcos? - f = ma
f = Pcos? - ma

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