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A 15.8 kg child on a 1.85 m long swing is pulled back to a 37.80 angle. How much PE does she have?
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A 15.8 kg child on a 1.85 m long swing is pulled back to a 37.80 angle. How much PE does she have?

User Tibur
by
5.1k points

1 Answer

3 votes

Answer: 60.16J

Step-by-step explanation:

The following information can be gotten from the question:

Mass, m = 15.8kg

Length, l = 1.85m

θ = 37.8°

g = 9.8m/s

Potential energy = mgh

= mgh(1 - cos θ)

= 15.8 × 9.8 × 1.85 × (1 - cos 37.8°)

= 286.454 × (1 - 0.79)

= 286.454 × 0.21

= 60.16J

Therefore, the potential energy is 60.16J.

User Timothy Baldwin
by
4.6k points
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