From point A to point B the motorcycle moved at a speed of 60 km / h, back at a speed of 10 m / s.

univerkov | January 17, 2021 | education

From point A to point B the motorcycle moved at a speed of 60 km / h, back at a speed of 10 m / s. Determine the average speed of the motorcycle for the entire movement.

These tasks: V1 (the speed of the motorcycle under consideration from point A to point B) = 60 km / h (in SI system V1 = 16.67 m / s); V2 (speed from point B to point A) = 10 m / s.

To determine the average speed of the motorcycle under consideration for the entire time of movement, we use the formula: Vav. = S / (t1 + t2) = S / (0.5S / V1 + 0.5S / V2) = 1 / (0.5 / V1 + 0.5 / V2).

Let’s make a calculation: Vav. = 1 / (0.5 / 16.67 + 0.5 / 10) = 1 / 0.08 = 12.5 m / s or 45 km.

Answer: The average speed is 12.5 m / s (45 km / h).

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.