raikemichelle
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a car has a mass of 975 kg. by pushing on the car, evan increses its speed from 0.5 m/s to 3 m/s. what impulse did evan apply to the car?
A. 2925 kg m/s
B. 487.5 kg m/s
C. 2438 kg m/s
D. 1215 kg m/s

Answer :

Impulse = change in momentum = F x dt
Where F is sufficiently large and dt is very small(tending to zero).

Therefore impulse = mass x final velocity - mass x initial velocity
                                = 975 x 3 - 975 x 0.5
                                = 2437.5 Kg-m/s. 
Hence option C is correct.

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