Question

use the scenario to answer the following question. a race car driver starts and finishes at the same position as he drives around a one - mile oval track, changing his direction as he turns around the corners of the track. if the driver makes 500 meters (m) around the oval track in 75 seconds (s), what is the speed and velocity of the car during this event? a s = 6.67 m/s; v = 0.0 m/s b s = 0.0 m/s; v = 6.67 m/s c s = 6.67 m/s; v = 6.67 m/s d s = 0.0 m/s; v = 0.0 m/s

Explanation:

Step1: Recall speed and velocity definitions

Speed is a scalar quantity given by total distance traveled divided by time. Velocity is a vector quantity given by displacement divided by time.

Step2: Calculate speed

The total distance traveled $d = 500$ m and time $t=75$ s. Speed $s=\frac{d}{t}=\frac{500}{75}\approx6.67$ m/s.

Step3: Calculate velocity

The driver starts and finishes at the same position, so the displacement $\Delta x = 0$ m. Velocity $v=\frac{\Delta x}{t}=\frac{0}{75}=0.0$ m/s.

Answer:

A. s = 6.67 m/s; v = 0.0 m/s