Answer:
The minimum power the motor would need is 2035 Watts.
Explanation:
the minimum power motor needed is given by the total work done on the load, Wtot and the total time it takes the load to be lifted, given by:
P = Wtot/t
the forces doing works on the load is the gravitational force, Wfg and the frictional force, Wf the total work done on the load is:
Wtot = Wfg + Wf
= m×g×d + f×d
= d×(m×g + f)
= (30)×(200×9.8 + 75)
= 61050 J
it takes t = 30s for the load to be lifted high the building, the minimum power neeed is then:
P = Wtot/t
= (61050)/(30)
= 2035 Watts
Therefore, the minimum power the motor would need is 2035 Watts.
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Answer:
Kg
Explanation:
The units of mass are gram (g) , kilograms (Kg)
But SI of mass accepted is Kilograms (Kg)
