holden is trying to determine the velocity of his race car. he went 20 meters east, turned around, and went…

holden is trying to determine the velocity of his race car. he went 20 meters east, turned around, and went 40 meters west. his car was 20 meters from the starting line. this took 5 seconds. what is the cars average velocity? o 4 m/s east o 4 m/s west o 12 m/s west o 12 m/s east

holden is trying to determine the velocity of his race car. he went 20 meters east, turned around, and went 40 meters west. his car was 20 meters from the starting line. this took 5 seconds. what is the cars average velocity? o 4 m/s east o 4 m/s west o 12 m/s west o 12 m/s east

Answer

Explanation:

Step1: Define displacement

Displacement is the straight - line distance from the starting point to the ending point. The car moves 20 m east and 40 m west. Taking east as positive and west as negative, the displacement $d=20 - 40=- 20$ m (negative means west - direction).

Step2: Recall velocity formula

The formula for average velocity is $v=\frac{d}{t}$, where $d$ is displacement and $t$ is time. Here, $d = - 20$ m and $t = 5$ s.

Step3: Calculate average velocity

$v=\frac{-20}{5}=-4$ m/s. The negative sign indicates the direction is west.

Answer:

4 m/s west