Answer:
alternating mountain ranges and valley.
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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.
Speed = distance/time
speed= 122÷27=4.52m/s (3sf)
Represent the sleaze time speed time and acceleration time graphs