Once the lorry has reached its destination, the back of the lorry is tilted at an angle 8 to the horizontal.

Three forces act on the box: the weight W, the normal contact force R and the
frictional force F

(i) State expressions for the components of the weight of the box parallel to the back
of the lorry and perpendicular to the back of the lorry.
(2)

W
parallel
W
perpendicular

(ii) The angle is increased until the box is just about to slide.
Given that F= 0.32R, calculate the value of at which the box is just about to slide.

W=200g

c. newton's third law of motion

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

+15-35=-20

going in opposite directions