Figure 11 is a graph which shows how the vertical height through which a machine raises a mass 20 kg varies with time.

      

Figure 11 is a graph which shows how the vertical height through which a machine raises a mass 20 kg varies with time.
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Determine the power output of the machine after 40 seconds

  

Answers


John
Power = Force x velocity

but F = mg = 20 x 10 = 200

velocity = $\frac{d}{t}=\frac{20}{40}$ = 0.5 m/ s
johnmulu answered the question on May 16, 2017 at 06:48


Next: Figure 12 shows a body of weight 50N placed on a surface which is inclined at an angle of 30o to the horizontal. The body experiences a maximum frictional force of 29 N with the surface.
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