Question

A car travels 100 km in 2 hours and 50 km in 1 hours in the some direction . (b). what is the car's average velocity for the whole journey?​

Answer 1

Answer:

Let

AV denotes the magnitude of resultant or average velocity.

θ denotes the angle between directions of average velocity and East.

Hence from above data we get,

AV = √[(100/2)^2 + (50/1)^2]

or AV = 50*√2 = 70.71 (km/hr) [Ans]

tan θ = (50/1)/(100/2)

or tan θ = 1 = tan 45°

or θ = 45° (South of East) [Ans]