Question

Камень шлифовального станка делает 50 об/мин деталь прижимается к камню с силой 100н коэффецент трение =0,2, какова механическая можность этого двигателя

Answer 1

N=мю*F*V=50*100*0,2/60=16,7[Bт]

Answer 2

Calculation of Mechanical Power

To calculate the mechanical power of the grinding machine, we need to use the formula:

Mechanical Power = Force x Velocity

In this case, the force is given as 100 N and the velocity is given as 50 revolutions per minute (rpm). However, we need to convert the velocity from rpm to radians per second (rad/s) before calculating the mechanical power.

Conversion of Velocity from RPM to Radians per Second

To convert the velocity from rpm to rad/s, we can use the following formula:

Angular Velocity (in rad/s) = (2π x Velocity (in rpm)) / 60

Let's calculate the angular velocity:

Angular Velocity = (2π x 50) / 60

Using this formula, we find that the angular velocity is approximately 5.24 rad/s.

Calculation of Mechanical Power

Now that we have the force and the angular velocity, we can calculate the mechanical power using the formula mentioned earlier:

Mechanical Power = Force x Angular Velocity

Substituting the values, we get:

Mechanical Power = 100 N x 5.24 rad/s

Calculating this, we find that the mechanical power of the grinding machine is approximately 524 Watts.

Conclusion

Therefore, the mechanical power of the grinding machine is approximately 524 Watts when the stone of the grinding machine rotates at a speed of 50 rpm and the detail is pressed against the stone with a force of 100 N, assuming a coefficient of friction of 0.2.