Final answer:
The average speed of the car was 18.18 m/s, obtained by dividing the distance traveled (400 m) by the time taken (22 s).
Step-by-step explanation:
To calculate the average speed of a car that travels 400m in 22 seconds, we use the formula for speed:
Speed = Distance ∕ Time
Plugging in the given values:
Speed = 400m ∕ 22s
Speed = 18.18 m/s
So the car was going 18.18 m/s.
- To convert the speed limit from 80 km/h to m/s, divide by 3.6, which would be approximately 22.2 m/s.
- A car traveling at an average speed of 86.4 km/h for 3.3 seconds would travel a distance of (86.4 km/h ∕ 3600s/h) ∕ (3.3 s) = 79.2 meters.
- If a velocity increases from 0 to 20 m/s in 10 s, the average acceleration is 2 m/s².