Question

Could someone double check my calcs? Thanks! :)

Two blocks m1 = 50kg and m2= 100kg are attached to a rope as shown in figure. Pulley is massless. The angle of the inclined plane is pi/6 and the coefficient of dinamic friction is 0.250. Find the variation of kinetic energy if the body m1 goes up 20meters.

Answer 1

I don't have the results, that's why I need someone to double check it.

Answer 2

i think u wrote the wrong equation for the body m1
as the body is sliding downwards sp the frictional force will try to restrict its motion n it'll act in upwards direction not in downwards direction
\[\implies \sum F= m _{1}gsin \theta-\mu m _{1}gcos \theta-T=m _{1}a\]

Answer 3

Uhm, why do you say the body would slide downwards? I think it should go upward instead, therefore the frictional force is positive (according to the axis I picked).

Answer 4

hmmm then u r correct according to ur reference
anyways the final answer needn harm by the reference so u r correct

Answer 5

Alrighty. Thanks.