[2] 0.5m 0.25 e its mass 1 3 Total:[4] Figure 4.1 termined (a) What is meant by moment of force? Include its Sl unit? [2] (13) (c) Calculate the moment of force if a force of 10N is applied at point 1 to open or close the door en filled with Moment of force= [2]
(d) Explain why it is easier to open or close the door if the handle is fixed at point 1 than at point 2 or 3. 10 to be [2] Total:[4]​

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?