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An athlete lifts a 330 N set of weights from ground level to a position over her head, a vertical distance of 2.05 m. Assume the weights are moved at constant speed. a) How much work does the athlete do?
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33 votes
33 votes
An athlete lifts a 330 N set of weights from ground level to a position over her head, a vertical distance of 2.05 m. Assume the weights are moved at constant speed. a) How much work does the athlete do? b) What is the mass of the weights?​

User Vikram Singh Jadon
by
2.4k points

1 Answer

18 votes
18 votes
  • Force=330N
  • Distance=2.05m

Work done:-

  • Force×Displacement
  • 330(2.05)
  • 676.5J

Now

Apply Newtons second law

  • F=ma

m is mass

a is acceleration due to gravity (10)

  • 330=10m
  • m=33kg
User Daveeloo
by
2.9k points
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