Question

1. m=500g
v=72km
Ec=?
2. m=1tona
h=20m
g=10N/kg
Ep gravitationala=?


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Answer 1

1.Ec=

$\frac{m \times {v}^{2} }{2}$

Ec=

$\frac{500 \times 5184}{2}$

Ec=250 x 5184

Ec=1296 kJ

2.m = 1t = 1000kg

Ep=mgh

Ep=1000×20x10

Ep=200kJ