First slide

Different question variety formed

Question

The acceleration - time graph of a particle moving in a straight line is shown in the fig. The velocity of the particle at time t=0 is 2ms^-1. The velocity after 2 seconds will be

Moderate

A

4ms^-1
B

6ms^-1
C

2ms^-1
D

8ms^-1

Solution

V_f- V_i = [Area under the graph] = $\frac{1}{2} (2) (4) = 4$
V_f = 2+4 = 6m/s

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