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Please help me easy question just get mixed up.

Please help me easy question just get mixed up.-example-1
User Bolo
by
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1 Answer

4 votes

Answer:

The mechanical energy of the ball is 112.667 J

Step-by-step explanation:

Mechanical energy = kinetic energy + potential energy

Where:

kinetic energy =
(1)/(2)m
v^(2)

potential energy = mgh

So that for the given ball, its mechanical energy =
(1)/(2)m
v^(2) + mgh

= m(
(1)/(2)
v^(2) + gh)

But, m = 400 g = 0.4 kg, v = 23.0 m/s, g = 9.81 m/
s^(2) and h = 1.75 m.

Mechanical energy of the ball = 0.4(
(1)/(2)(
23^(2)) + 1.75*9.81)

= 0.4(264.5 + 17.1675)

= 0.4 x 281.6675

= 112.667

The mechanical energy of the ball is 112.667 J.

User DroidHeaven
by
3.1k points