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Answer 1 · 2017-11-23T16:30:38

#"22.5 N"#

The force that makes a body follow a curved path is called centripetal Force.

It is given by the expression

#F = (mv^2)/r#

For same object moving in same circle #F ∝ v^2#

#F_2/F_1 = (v_2/v_1)^2#

#F_2 = F_1 × (v_2/v_1)^2#

#F_2 = "2.5 N" × ((3.6 cancel"m/s")/(1.2 cancel"m/s"))^2#

#F_2 = "22.5 N"#

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