(a) What is the momentum of the car at t = 2.0 s? vector P= ____ kg * m/s (b) Wh

Question

(a) What is the momentum of the car at t = 2.0 s?

vector P= ____ kg * m/s

(b) What is the momentum of the car at t = 7.0 s?

vector p= ____ kg* m/s

(c) What is the car's velocity at t = 9.0 s?

vector v= ____ m/s

A 4.6 kg toy race car can move along an x axis. The figure below gives Fx of the force acting on the car, which begins at rest at time t = 0. (The vertical axis is marked in increments of 2 N.) (a) What is the momentum of the car at t = 2.0 s? vector P= ____ kg * m/s (b) What is the momentum of the car at t = 7.0 s? vector p= ____ kg* m/s (c) What is the car's velocity at t = 9.0 s? vector v= ____ m/s

Explanation / Answer

a) area 10*2 *0.5*2 = 20 kg * m/s b) area = 20 +20 + 40 - 2.5 = 77.5 kg * m/s c) 20 +20 + 40 - 2.5 -2.5 - 5 = 70 mv= 70 v = 70/4.6 = 15.21 m/s

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