A1.5 kg cart initially moves at 2.0 m/s. it is brought to rest by a constant net force in .30s. what is the magnitude of the net force?

Given:

mass (m) = 1.5 kg ,

velocity (v) =2 m/s ,

time (t) = 0.30s ,

magnitude of net force (Fnet) = m. a

                                                =  1.5 × (v/t)           since a = v/t

                                                = 1.5 × (2/0.30)

                                                = 10 N

Magnitude of net force is 10 N

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