Question

A block of mass 15kg rest on a horizontal floor ( coefficient of friction is 0.4)
(A) what force is required just to make de block move when (i) pulling horizontally (ii) pulling at an angle of 60 to the horizontal
(2) if the block is pulled with horizontal force of 50N, with what acceleration does it move. Take g=10m/s

Answer 1

Fnet>Fmk

Fmk=m*a*mk=(15kg)*(9.8m/s^2)*(0.4)=58.8N


Fnet>58.8N

@60 ° angle

58.8N=Fcos60

(58.8N/Cos60)=117.6=F

117.6 N < Fnet

Does it move when 50N is pulling it in the horizontal direction????

Answer 2

Yes