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10 PTS!!! HELP! Lifting a chair that weighs 4 kg to a height of 40 cm takes 16 J of energy. a) What amount of energy would be needed to lift a similar chair to a height of 80 cm? b) What amount of energy
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2 votes
10 PTS!!! HELP!

Lifting a chair that weighs 4 kg to a height of 40 cm takes 16 J of energy.

a) What amount of energy would be needed to lift a similar chair to a height of 80 cm?

b) What amount of energy would be needed to lift a chair that weighs 2kg to a height of 40 cm?

User Ids Van Der Zee
by
7.2k points

2 Answers

6 votes
Answer for a = 32 j
Answer for b = 8 j
User Dmitry Fadeev
by
7.5k points
3 votes
a) To lift a similar chair to a height of 80 cm, you would need 32 joules.
b) The amount of energy that would be needed to lift a chair that weighs 2kg to a height of 40 cm would be 8 joules.
User Akshay Goyal
by
8.4k points
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