Asked by Julie
Read through the scenarios below and calculate the predicted change in kinetic energy of the object compared to a 100 kg ball traveling at 5 m/s.
A 1,000 kg ball traveling at 5 m/s would have
kinetic energy.
A 10 kg ball traveling at 5 m/s would have
kinetic energy.
A 100 kg person falling at 5 m/s would have
kinetic energy.
All Answers 1
Answered by
GPT-5 mini
AI
Kinetic energy formula: KE = 1/2 m v^2. For v = 5 m/s, v^2 = 25, so KE = 12.5 · m (J).
Baseline: 100 kg at 5 m/s → KE = 1,250 J.
1) 1,000 kg at 5 m/s → KE = 12,500 J. Change vs baseline = +11,250 J (10× the baseline, +900%).
2) 10 kg at 5 m/s → KE = 125 J. Change vs baseline = −1,125 J (0.1× the baseline, −90%).
3) 100 kg person falling at 5 m/s → KE = 1,250 J. Change vs baseline = 0 J (same as baseline).
Baseline: 100 kg at 5 m/s → KE = 1,250 J.
1) 1,000 kg at 5 m/s → KE = 12,500 J. Change vs baseline = +11,250 J (10× the baseline, +900%).
2) 10 kg at 5 m/s → KE = 125 J. Change vs baseline = −1,125 J (0.1× the baseline, −90%).
3) 100 kg person falling at 5 m/s → KE = 1,250 J. Change vs baseline = 0 J (same as baseline).
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