Suppose you use an ideal pulley of the type shown in Figure 5.18(a) to support a car engine of mass 120 kg. Figure 5.18 (a) What would the tension in the rope be? Correct: Your answer is correct. N (b) What force must the ceiling supply, assuming you pull straight down on the rope? Neglect the pulley system's mass.

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

vapour or gas assuming atmospheriv pressure

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