Question

Which pair of sentences is describing the same velocity?

A. car is parked. A car is moving in circles.
B. bus drives 40 miles per hour north. A truck drives 50 miles per hour north.
C. boy walks east at 6 kilometers per hour. A girl walks west at the same speed as the boy.
D.Valerie rides her bike south at 8 kilometers per hour. Owen jogs south at 8 kilometers per hour.

Answer 1

the answer would be B because velocity is the speed of something in a given direction.

Answer 2

Answer:  D) Valerie rides her bike south at 8 kilometers per hour. Owen jogs south at 8 kilometers per hour.

Explanation:

Since velocity is a vector quantity so it will have magnitude as well as direction . Two objects are said to have same velocity if both are travelling with same speed in same direction.C

Consider case (A) - in this case speed of cars are different because one car is at rest while other is moving with certain speed. Thus velocity is different .

Consider case (B) - Bus and truck are travelling with different speed so velocity of truck is different from velocity of bus .

Consider case (C)- In this case both boy and girl are travelling with same speed but in different direction thus velocity of boy is different from the velocity of girl .

Consider case (D)- In this case Valerie and Owen are travelling in same direction (towards south) with same speed of 8 kilometers per hour. Therefore they are travelling with same velocity .

Thus the pair of sentences describing the same velocity is

D) Valerie rides her bike south at 8 kilometers per hour. Owen jogs south at 8 kilometers per hour.