Question

Автомобиль массой 1000кг на горизонтальном участке дороги затратил на торможение 1с. Найдите работу силы трения за время торможения ,если коэффициент трения между дорогой и колесами равен 0,1

Answer 1

Fтр=Mmg
Fтр=0,1*1000*10=1000H

Answer 2

Calculating Frictional Force during Braking

To calculate the work done by the frictional force during braking, we can use the following formula:

Work = Force × Distance

First, we need to find the force of friction using the formula:

Frictional Force = Coefficient of Friction × Normal Force

The normal force can be calculated using the formula:

Normal Force = Mass × Acceleration due to Gravity

Given: - Mass (m) = 1000 kg - Coefficient of Friction (μ) = 0.1 - Time of Braking (t) = 1 s

We can find the acceleration using the formula: Acceleration = Change in Velocity / Time

Since the car is braking to a stop, the final velocity is 0 m/s. The initial velocity is not given, so we assume it to be constant, and the change in velocity is equal to the initial velocity.

Let's calculate the acceleration first and then use it to find the force of friction and the work done.

Calculating Acceleration

The acceleration can be calculated using the formula: Acceleration = Change in Velocity / Time

Since the car is braking to a stop, the final velocity is 0 m/s. The initial velocity is not given, so we assume it to be constant, and the change in velocity is equal to the initial velocity.

Calculating Force of Friction

The force of friction can be calculated using the formula: Frictional Force = Coefficient of Friction × Normal Force

Calculating Work Done

Finally, we can calculate the work done by the frictional force using the formula: Work = Frictional Force × Distance

Let's calculate the acceleration, force of friction, and work done using the given information.