When light travels through a small hole, it appears to an observer that the light spreads out, blurring the outline of the hole.
1 answer:
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To find the kinetic energy . You have to use this equation : 1/2m(v^2) .
Answer:
Efficiency = 80%
Explanation:
Given the following data;
Work output = 240 N
Work Input = 300 N
To find the mechanical efficiency of a machine;
Substituting into the equation, we have;
Efficiency = 80%
Therefore, the mechanical efficiency of the machine is 80 percent.