Force/Slope Question

I've worked out (i), having problems with (ii). I know that the torque will be force x 0.75 but I haven't had any success in working out the force in the first place.

 

Without an acceleration, I'm not sure.

 

Right I've got the acceleration but I'm not getting the correct force. You're saying the force needed to work out the torque is when there is no incline?

 

F = ma
= 1920 x 0.41
= 787.2

Fw = mgsinangle
= 1920 x 9.81 x sin10
= -10246.7

 

Ah, I was in radians...

Fw = mgsinangle
= 3270.7

 

Then just add the Ff to that and the Fu I've got it... Thanks, I've made that much more difficult than it should have been!

 

I'm assuming the torque needed for the drum, which would be used to calculate the total torque needed by the motor is the same? Just different values.