Force = Weight / Sin 35°
Force = 150 / Sin 35°
Force = 261.52 lbs ◄ Ans
Note: The force tend to increase because it is pulling the weight and at the same time it raise to an elevation of 35°increment.
If the force is equal to the load(wt) then the block will be in equilibrium state or it will not move yet considering that friction is negligible & the plane is level to the ground.
hope this helps