An objec with a mass of 7 kg accelerates 5m/s2 when an unknown force is applied to it. what is the magnitude of the unknown force?

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

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.

Both speed and velocity measure how fast something is moving. however, since speed is not a it does not require a(n question 6 options: a) quantity , unit b) magnitude, unit c) scalar, direction d) vector, direction