Tolong dijawab No 1nya

1.
a) Ep = mgh = 10kg × 10m/s^2 × 9m = 900J
Ek = 1/2mv^2 = 1/2 × 10kg × 0^2 = 0J
Em = Ep+Ek = 900J + 0J = 900J
b) Ep = mgh = 10kg × 9,8m × 0m = 0J
Em1 = Em2
Ep1 + Ek1 = Ep2 + Ek2
900J + 0 = 0 + Ek2
Ek = 900J
c) 900J = 1/2 × 10kg × v^2
900J = 5kg × v^2
v^2 = 900J/5kg = 180J/kg
v = akar dari 180 = 3 akar 20 m/s


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