Answer:
Explanation:
Given
Displacement is 
of Amplitude
i.e. 
, where A is maximum amplitude
Potential Energy is given by
Total Energy of SHM is given by
Total Energy=kinetic Energy+Potential Energy
Potential Energy is 
th of Total Energy
Kinetic Energy is 
of Total Energy
(c)Kinetic Energy is 
(1) friction is the force resisting the relative motion of solid surfaces , fluid layers and material elements sliding against each other.
(2) gravity is a science fiction .
(3) Resistance ::: is a property of a conductor by which the passage of current is opposed causing electric energy to be transformed into heat .
(4) viscosity is the quantity that describes a fluid.
(5)
4*5=20; ration of 20:25,
20/25= %80
More work is done when one man lifts the weight using a pulley. Option C is correct.
<h3>What is mechanical advantage ?</h3>
Mechanical advantage is a measure of the ratio of output force to input force in a system, it is used to obtained efficiency of forces in levers and pulley.
It is an effective way of amplify the force in simple machines like lever The theoretical mechanical advantage is defined as the ratio of the force responsible for the useful work in the system to the applied force.
More work is done when one man lifts the weight using a pulley. With the pulley, the mechanical advantage is increasing.
Hence, option C is correct.
To learn more about the mechanical advantage, refer to the link;
brainly.com/question/7638820
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The distance the object moved is 100 m
the power of the machine is 1000 watts
distance = work/force (because work = force x distance)
distance = 20000/200 = 100
power = work/ time
power = 20000/20 = 1000
