The law of conservation of energy<span> states that the total </span>energy<span> of an </span>isolated system<span> remains constant. </span><span>Energy can neither be created nor destroyed; rather, it transforms from one form to another. For instance, </span>chemical energy<span> can be </span>converted<span> to </span>kinetic energy<span> in the explosion of a stick of </span>dynamite<span>.</span>
The maximum height of the object when thrown at the speed of 20 m/s is 20 m.
What is speed?
Speed is the magnitude of the rate of change of the position of any object with time which is a scalar quantity. It is the ratio of speed by time with the unit m/s or cm/s.
The height this object can travel with initial speed of 20 m/s can be calculated as,
<u>v^2 = u^2 + 2as</u>
where v is the final velocity, u is the initial velocity a is the acceleration due to gravity s is height.
0 = 20^2 + 2 (-10) s
s = 400 / 20 = 20 m
Therefore, the maximum height the object can travel with initial speed of 20 m/s is 20m.
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Newton's Second Law of Motion states, “The force acting on an object is equal to the mass of that object times its acceleration.” We calculate as follows:
F = ma
At the moon,
104 N = m(1.61 m/s^2)
m = 64.60 kg
Mass will still be the same when on earth since mass is conserved.
At earth,
F=ma
F = 64.60 kg (9.8 m/s^2)
F = 633.04 N <----ANSWER