A car with a mass of 2000 kg began to move from a state of rest and, when driving on a horizontal
| May 22, 2021 | education
A car with a mass of 2000 kg began to move from a state of rest and, when driving on a horizontal road, reached a speed of 108 km / h. What useful work did the car engine do?
To find the value of the useful work of the engine of the presented car, we use the formula: Ap = ΔEk = ma * ΔV2 / 2.
Variables: ma – vehicle weight (ma = 2000 kg = 2 * 10 ^ 3 kg); ΔV – speed change during acceleration (ΔV = 108 km / h = 30 m / s).
Calculation: Ap = ma * ΔV2 / 2 = 2 * 10 ^ 3 * 302/2 = 900 * 10 ^ 3 J.
Answer: The useful work of the engine of the presented car is 900 kJ.
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.
