Question

A car starts at 1:00 p.m. from Savannah and moves with varying speed towards Macon, where it reaches at 3:20p.m. If the distance from Savannah to Macon is 268.76 km, the average speed of the car in m/s is approximately

i) 28.00 m/s
ii) 36.00 m/s
iii) 32.00 m/s
iv) 23.00 m/s

Answer 1

The average speed of the car is found by converting the total travel time to seconds and the distance to meters, resulting in an average speed of approximately 32.00 m/s.

Step-by-step explanation:

To calculate the average speed of the car in meters per second (m/s), we first need to convert the travel time from 1:00 p.m. to 3:20 p.m. into seconds. The difference is 2 hours and 20 minutes which is 140 minutes or 8400 seconds. Next, we convert the distance from Savannah to Macon into meters, which is 268.76 km * 1000 = 268760 meters.

The formula for average speed is:

Vavg = distance / time

Plugging in the values we get:

Vavg = 268760 m / 8400 s ≈ 32.00 m/s

Therefore, the average speed of the car is approximately 32.00 m/s, matching option iii).