Question

The Figure shows the Position-time (x – t) graph of one dimensional motion of a body of mass The magnitude of each impulse is 

(A) 0.2 Ns 

(B) 0.4 Ns 

(C) 0.8 Ns 

(D) 1.6 Ns

Answer 1

Correct option: (C) 0.8 Ns

Explanation:

impulse = Δp = m(v_f – v_i)

= m [(x / 2) – {–(x / 2)}] … slope = (dx / dt) = v

Δp = mx

Δp = (0.4)(2)

= 0.8 Ns