Question

An object of mass 40 kg is raised to a height of 5 m above the
ground.' What is its potential energy? If the object is allowed to
fall, find its kinetic energy when it is half-way down. ​

Answer 1

Answer:

MASS (M) = 40 KG

HEIGHT (H)= 5 M

WE KNOW, POTENTIAL ENERGY (U) = MGH

G = ACCELERATION DUE TO GRAVITY = 9.8 M S−2OR

U = 40 X 9.8 X 5 = 1960 J

(B)NOW ,IF THE OBJECT IS AT HALF-WAY DOWN,

,THE POTENTIAL ENERGY OF THE OBJECT = KINETIC ENERGY/2

=1960 / 2 = 980 J.

.Due to the law of conservation of energy. the object has an equal amount of potential and kinetic energy. Hence, half way down, the kinetic energy of the object will be 980 J.

Answer 2

Answer:

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