Question

5kg ball thrown up with a speed of 10m/s find kE and PE

Answer 1

Answer:

Explanation: At the highest point ball momentarily cones to rest. Therefore, at the highest point velocity (v) is zero.

Using equation:

v^2 - u^2 = -2gS

u^2 / 2g = S

S = (10)^2 / 2 x 10

S = 100 / 20

S = 5 m

Therefore, body reaches a maximum height of S = 5 m

At this point Potential Energy (U) of particle is:

U = mgS

U = 5 x 10 x 5

U = 250 J

Here, I took g = 10 m/s^2

If you take g = 9.8 m/s^2 you Kay get slightly different answer.

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