Question

In a 400 m race, the person running in the innermost lane clocked 50 s and won the gold medal. Find his average velocity. Is the magnitude of the average velocity the same as the value of the average speed? (Hint: For the innermost lane, the starting point is the same as the finishing point.)

a) 8 m/s; Yes
b) 8 m/s; No
c) 50 m/s; Yes
d) 50 m/s; No

Answer 1

The average velocity is 0 m/s and the magnitude of average velocity is not the same as average speed.

Step-by-step explanation:

The average velocity is determined by dividing the total displacement by the total time taken. Since the starting point is the same as the finishing point, the displacement is 0.

So, the average velocity will be 0 m/s.

The magnitude of average velocity is not the same as the average speed. Average speed is determined by dividing the total distance traveled by the total time taken. In this case, since the distance is 400 m and the time is 50 s, the average speed will be 8 m/s.

Therefore, the correct option is b) 8 m/s; No.