Question

Help me please it’s due right now review question help

Answer 1

Answer: E = 113 J

Explanation:

Mechanical energy is the sum of kinetic and potential energy

If we assume that ground level is the origin of the reference frame.

E = ½mv² + mgh

E = m(v²/2 + gh)

E = 0.400(23.0²/2 + 9.81(1.75))

E = 112.667 ≈ 113 J

Answer 2

Answer:

M.E = mgh

given, m=400g = 400/1000=0.4kg

h=1.75m

g=9.81m/s²

M.E =0.4×9.81×1.75

=6.867J