You are pulling your little sister on her sled across an icy (frictionless) surface. When you exert a constant horizontal force of 120 N , the sled has an acceleration of 2.3 m/s2 . Part A If the sled has a mass of 8.0 kg , what is the mass of your little sister

Mass of Little Sister = 44.17 kg

Explanation:

From Newton's second law of motion, the magnitude of force applied on the sled is given by the following formula:

F = ma

where,

F = Force Applied = 120 N

a = Acceleration = 2.3 m/s²

m = Mass of Sled + Mass of Little Sister = 8 kg + Mass of Little Sister

Therefore,

120 N = (2.3 m/s²)(8 kg + Mass of Little Sister)

(120 N)/(2.3 m/s²) = 8 kg + Mass of Little Sister

Mass of Little Sister = 52.17 kg - 8 kg

Mass of Little Sister = 44.17 kg

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