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Understand: predictions using energy

You might need: Calculator

Problem

A father places his daughter in a swing that is 0.60m above ground. Then he raises the swing to a height of 1.3m and lets go. The girl and the swing have a combined mass of 14kg. Assume friction is negligible and use g=9.8m/s2.
Calculate the girl’s fastest speed.
Round your answer to the nearest tenth.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
m/s
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