Laws of MotionHard

Question

A 2 kg toy car can move along an x axis. Graph shows force Fx, acting on the car which begins at rest at time t = 0. The velocity of the particle at t = 10 s is :   

Options

A.- i m/s
B.-1.5 i m/s
C.6.5 i m/s
D.13 i m/s

Solution

= pf − pi =   = Area under the curve.
pi = 0
Net Area = 16 − 2 − 1        = 13 N -s
Vf = = 6.5 i m/s

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