A sealed, empty 1.0 L plastic sports bottle is sitting on a porch in the hot sunlight. The temperature of the air inside the bottle
is 39 °C (312 K). When the sun goes down, the air in the bottle
cools to 20.°C (293 K). Assuming that the bottle is completely
flexible, what is the volume of air at the cooler temperature?

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

cutt.ly/zxt1ipy

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards