Question

Автомобиль проходит середину выпуклого моста радиусом 50 м. со скоростью 20 м/с. Найдите вес автомобиля в этой точке.

Answer 1

P=mg-mv²/R=m(g-v²/R)

Нужно знать массу автомобиля.

Вес уменьшится в 5 раз   m*10/m*2=5

Answer 2

Calculating the Weight of the Car on the Bridge

To calculate the weight of the car at the midpoint of the convex bridge, we can use the formula:

Weight = (mass of the car) × (acceleration due to gravity)

First, we need to find the acceleration of the car as it travels along the curved path of the bridge. We can use the formula:

Centripetal acceleration = (velocity^2) / radius

Given: - Radius of the bridge, r = 50 m - Velocity of the car, v = 20 m/s

Using the centripetal acceleration formula: a = (20^2) / 50 = 8 m/s^2

Now, we can calculate the weight of the car using the formula: Weight = (mass of the car) × (acceleration due to gravity)

We can assume the acceleration due to gravity, g, as 9.81 m/s^2.

Calculation

Weight = (mass of the car) × 9.81

To find the mass of the car, we need to rearrange the formula: mass of the car = Weight / 9.81

Substitute the calculated acceleration due to gravity: mass of the car = Weight / 9.81 = (8 / 9.81) kg

Conclusion

The weight of the car at the midpoint of the convex bridge is approximately 0.816 kg.