1. A dog is pulling a sled to the right with a force of 15N. A rhino is pulling the same
sled to the left with a force of 42N. There
is a frictional force of 5.0N acting on the
sled
a. Which direction is the friction acting?

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

= initial pressure

= final pressure = 2

= initial volume

= final volume = /4

= initial temperature = 20 c = 20 + 273 = 293 k

= final temperature = ?

using the equation