The car, moving at a speed of 12 m / s, left the hill in 35 s, and then covered 0.18 km to a complete stop in 55 s.
| May 11, 2021 | education
The car, moving at a speed of 12 m / s, left the hill in 35 s, and then covered 0.18 km to a complete stop in 55 s. The average speed of the car along the entire track is …
Task data: V1 (speed of the car when going down the hill) = 12 m / s; t1 (time of descent from the hill) = 35 s; S2 (the path of the car to a full stop) = 0.18 km (in SI S2 = 180 m); t (time of movement of this car to a complete stop) = 55 s.
We calculate the average speed of the car along the entire route using the formula: V = S / t = (S1 + S2) / (t1 + t2) = (V1 * t1 + S2) / (t1 + t2).
Calculation: V = (12 * 35 + 180) / (35 + 55) = 600/90 = 6.67 m / s.
Answer: The average speed of the car along the entire track is 6.67 m / s.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
