Question

14. The position (x)-time (t) graph for a particle of mass 1 kg moving along x-axis is shown in
figure. Find impulse on particle at t = 4 s.
x (m)4
20
t(s)
8​

Answer 1

Impulse = Pf - Pi

(where P = momentum = mv)

Pi = m(d/t) = 1(20/4) = 5 kg m/s

Pf = m(d/t) = 1(-20/4) = -5 kg m/s

I = Pf - Pi = -5 -5 = -10 kg m/s