Gravitational 12411

We lift a weight of 2 kg to a height of 50 cm above the top of the table. Determine its gravitational potential energy:

a) relative to the tabletop,
b) relative to the floor if the table top is 1m above the floor.

Correct answer:

E1 =  10 J
E2 =  30 J

Step-by-step explanation:

m=2 kg g=10 m/s2 h1=50 cm m=50:100  m=0.5 m h2=1 m  E1=m g h1=2 10 0.5=10 J
E2=m g (h1+h2)=2 10 (0.5+1)=30 J

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