3. 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…
3. 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
Answer
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