To what height should a brick weighing 2.1 kg be lifted to increase its potential energy by 19.8 J?
| November 23, 2020 | education
Given:
m = 2.1kg
∆Еp = 19.8J
To find:
h =?
Decision:
If the brick was at zero potential energy, then
∆Еp = mgh
h = ∆Ep: (mg)
h = 19.8: (2.1 * 10) = 19.8: 21 = 0.94m
Answer: 0.94m
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