A car weighing 5 tons moves along a concave bridge at a speed of 72 km / h. The bridge forms an arc with a radius of 100m.
| December 14, 2020 | education
A car weighing 5 tons moves along a concave bridge at a speed of 72 km / h. The bridge forms an arc with a radius of 100m. Find the force with which the car pushes against the bridge while driving through its middle.
Given: m = 5 t = 5000kg. V = 72km / h = 20m / s g = 10 N / kg. R = 100 m.
Find: F-?
Solution: F = mg => mV ^ 2 / R. 5000kg * 10N / kg = 50000N- 5000kg * 400m / s / 100m = 30000N = 30kN.
Answer: 30kN.
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