Question

speed, velocity & acceleration
abdulcebbar gungormus
motion tutorial: speed, velocity & acceleration
brandi stracuzzi
multiple - choice question
which of the following is an example of velocity?
a car speeding up at 3 m/s².
a student walking at 3 m/s.
a bicyclist traveling at 20 km/h east.
a truck stopping at 10 m/s².

Explanation:

Step1: Recall the definition of velocity

Velocity is a vector quantity (has magnitude and direction).

Step2: Analyze each option

• Option 1: \(3\ m/s^{2}\) is acceleration (rate of change of velocity), not velocity.
• Option 2: \(3\ m/s\) is speed (scalar, no direction).
• Option 3: \(20\ km/h\) east has magnitude (\(20\ km/h\)) and direction (east), so it is velocity.
• Option 4: \(10\ m/s^{2}\) is deceleration (negative acceleration), not velocity.

Answer:

C. A bicyclist traveling at 20 km/h east.