Cada 100 cm es de 1 m por lo que tomar los kilos a su vez a cm, a continuación, a su vez a metros
Answer:
Explanation:
Data given
represent the applied force by the wheel
represent the radius for the wheel
represent the rotational speed given
represent the kinetic friction coeffcient given.
Solution to the problem
For this case we need to find first the spped with the usual units in m/s like this:
And we can replace the values given and we got:
Now we can calculate the friction force, for this case we assume that the normal force is the force exerted by the wheel and from the definition:
Now we can calculate the power assuming that all the energy is converted to kinetic energy from the motor with the following formula:
And we can replace with the values that we found:
And that would be the energytransferred from the motor driving the wheel to the thermal energy of the wheel and tool and to the kinetic energy of the material thrown from the tool.
Answer:
5 m/s
Explanation:
Here we can see there is no external force acted on a two masses when we consider the motion. If there is no external forces then momentum is conserved.
Initial momentum = Final momentum
0.5 × 10 = 1 × V
V = 5 m/s
Normal force = 200(9.81) = 1962 N
Friction force = 1962 * .4 = 784.8
power = force * distance / time = 784.8 * 5 = 3924 Watts
Watts = Joules / sec
3924 x 180 = 706,320 Joules