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Natasha_Volkova [10]
3 years ago
8

You do 174 J of work while pulling your sister back on a swing, whose chain is 5.10 m long, until the swing makes an angle of 32

.0° with the vertical. What is your sister's mass?
Physics
1 answer:
grigory [225]3 years ago
6 0
Potential energy U = 174J = m*g*Δh

m mass
g = 9.81 m/s²
Δh = 5.1 - 5.1cos32° = 0.77

Solve for m.
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