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?

m=88/2.97=29.63kg

Explanation

Use 2.10 m as the radius

v=2.5m/s

Fc=88N

m=?

We know Fc=mv^2/r

so 88=m(2.5)^2/2.1

88=6.25m/2.1

88=2.97m

m=88/2.97=29.63kg

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas