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## 4. A girl is sitting on a tire swing that is attached with a rope that is 2.1 m in length. Her dad pushes her with a speed of 3.0 m/s. If th

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4. A girl is sitting on a tire swing that is attached with a rope that is 2.1 m in length. Her dad pushes her with a speed of 3.0 m/s. If the centripetal force is 88 N, what is the mass of the girl?

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Physics
6 months
2021-07-30T17:20:23+00:00
2021-07-30T17:20:23+00:00 1 Answers
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## Answers ( )

The centripetal acceleration is given by

a

=

v

2

r

and Newton’s Second Law says

F

=

m

a

, so

F

=

m

v

2

r

. Rearranging,

m

=

F

r

v

2

=

88

⋅

2.1

2.5

2

≈

29.6

k

g

.