The car drove up to point a, picked up a speed of 60 km per hour and moved evenly along the straight

| September 9, 2021 | education

The car drove up to point a, picked up a speed of 60 km per hour and moved evenly along the straight section of the road. Having reached point B in 10 minutes, he turned back and moved uniformly with the same speed for another 7 minutes. Plague is equal to the path of the car and the module of its movement.

Speed data: V (constant speed of a given vehicle) = 60 km / h; t1 (duration of movement to point B) = 10 minutes (1/6 h); t2 (duration of movement in the opposite direction) = 7 minutes (7/60 hours).

1) The distance traveled by the given vehicle: S = S1 + S2 = V * t1 + V * t2 = V * (t1 + t2) = 60 * (1/6 + 7/60) = 17 km.

2) Movement module: S = | S1 – S2 | = | V * t1 – V * t2 | = | V * (t1 + -t2) | = 60 * (1/6 – 7/60) = 3 km.

Answer: The path is 17 km, the movement is 3 km.



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