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a car with a mass of 1.2×10^3 kilograms is moving at a speed of 18 meters/second. it is hit by a truck from behind and it's speed after the collision increases to 20 meter/second. what is the value of impulse?

Respuesta :

limacharliesierra
I = Delta p

I = Impulse
Delta p = Momentum variation

Delta p = pf - po

Pf = Final momentum
Po = Initial momentum

p = m x v

M = Mass
V = Velocity

Delta p = (m x Vf) - (m x Vo)

I = 1.2 x 10^3 x 20 - 12 x 10^2 x 18
I = 2.4 x 10^4 - 216 x 10^2
I = 2.4 x 10^4 - 2.16 x 10^4
I = 0.24 x 10^4
I = 24 x 10^2 Newtons x seconds (N x s)

Answer: The value of impulse is 24 x 10^2 Newtons x seconds (N x s).