Question

1. a car covers 21 meters in 7 seconds. the speed of the car is (a) 2 m/s (b) 3.0 m/s (c) 98 m/s (d) none of the above

Explanation:

Step1: Recall speed formula

Speed = $\frac{Distance}{Time}$

Step2: Substitute values

Given distance = 21 meters and time = 7 seconds. So, speed = $\frac{21}{7}$ = 3 m/s

Answer:

B. 3.0 m/s