Question

. A body of mass 5kg is dropped from a height of 20m. Determine its K.E. when it is: (i) Dropped (ii) reached mid-point (iii) on striking the ground ​

Answer 1

Answer:

you can calculate the speed when it hits the ground and then say 1/2 m V^2, but it is easier to say that all the kinetics energy came from the potential energy at the top

m g h = 5 * 9.81 * 5 = 245 jouls

Answer 2

Answer:

Solution:

Now,

You can calculate the speed when it hits the ground and then say 1/2 m V^2, but it is easier to say that all the kinetics energy came from the potential energy at the top

m g h = 5 * 9.81 * 5 = 245 jouls

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