A car travels 150 km east in 3 hours. Which statement is correct about its average speed and average velocity?

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Multiple Choice

A car travels 150 km east in 3 hours. Which statement is correct about its average speed and average velocity?

Explanation:
Average speed and average velocity differ in that speed is a scalar (no direction) while velocity is a vector (has direction). The car covers a total distance of 150 km in 3 hours, so its average speed is 150 ÷ 3 = 50 km/h. The displacement is the straight‑line change in position, which is 150 km to the east, so the average velocity is displacement ÷ time = 150 ÷ 3 = 50 km/h east. This matches the statement that speed is 50 km/h and velocity is 50 km/h east. The other options would require inconsistent distance or displacement values (for example, a velocity with a magnitude of 150 km/h or a speed of 150 km/h would imply a different total distance than 150 km).

Average speed and average velocity differ in that speed is a scalar (no direction) while velocity is a vector (has direction). The car covers a total distance of 150 km in 3 hours, so its average speed is 150 ÷ 3 = 50 km/h. The displacement is the straight‑line change in position, which is 150 km to the east, so the average velocity is displacement ÷ time = 150 ÷ 3 = 50 km/h east. This matches the statement that speed is 50 km/h and velocity is 50 km/h east. The other options would require inconsistent distance or displacement values (for example, a velocity with a magnitude of 150 km/h or a speed of 150 km/h would imply a different total distance than 150 km).

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