Question

A car travels 10 m/s east. Another car travels 10 m/s north. The relative speed of the first car with respect to the second is:

a. more than 20 m/s.
b. equal 20 m/s
c. 0 m/s.
d. less than 20 m/s.

Answer 1

d. less than 20m/s

Step-by-step explanation:

To the 2nd car, the first car is travelling 10m/s east and 10m/s south. So the total velocity of the first car with respect to the 2nd car is

[tex]\sqrt{10^2 + 10^2} =10\sqrt{2}=14.14m/s

As 14.14m/s is less than 20m/s. d is the correct selection for this question.