Question

5. A girl sits on a tire swing that is attached with a rope that is 2.10 m in length. Her dad pushes her with a speed of
2.5 m/s. If the centripetal force is 88.0 N. what is the girl's mass? ​

Answer 1

Explanation:

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