The truck is moving at a speed of 60 km / h. The driver sees that in relation to his car, the passenger car went to overtake
| September 7, 2021 | education
The truck is moving at a speed of 60 km / h. The driver sees that in relation to his car, the passenger car went to overtake at a speed of 20 km / h. What is the speed of a car relative to the road?
Vload = 60 km / h.
Vleg / load = 20 km / h.
Vleg -?
The speed of a passenger car Vleg relative to a stationary frame of reference, relative to the road will be the sum of: the speed of the moving frame of reference Vload, in our case it is the speed of a truck, and the speed of a body relative to a moving frame of reference, that is, the speed of a passenger car relative to a cargo Vleg / load.
Vleg = Vload + Vleg / load.
Vleg = 60 km / h + 20 km / h = 80 km / h.
Answer: the speed of a car relative to the road is Vleg = 80 km / h.
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