Question

Со скоростью, модуль которой 72 км/ч, автомобиль массой 3 т проезжает середину выпуклого моста, радиус которого 100 м. Определить силу давления пвтомобиля на мост.

Answer 1

Дано  V=72 км/ч=20 м/с     R=100 м    m=3000 кг   P- ?

P= m*g - m*V^2/2=m*(g - V^2/R)=3000*(10-4)=18 000 Н

Answer 2

Calculation of the Force of Pressure on the Bridge

To calculate the force of pressure exerted by the car on the bridge, we need to use the formula for centripetal force. The centripetal force is given by the equation:

F = (m * v^2) / r

Where: - F is the force of pressure - m is the mass of the car - v is the velocity of the car - r is the radius of the bridge

Given: - The mass of the car is 3 tons, which is equivalent to 3000 kg. - The velocity of the car is 72 km/h, which is equivalent to 20 m/s. - The radius of the bridge is 100 m.

Substituting these values into the formula, we can calculate the force of pressure:

F = (3000 kg * (20 m/s)^2) / 100 m

Calculating this expression, we find:

F = 12000 N

Therefore, the force of pressure exerted by the car on the bridge is 12000 Newtons.