Question

The velocity-time graph of a train travelling between two stations, is plotted as below:

Find train's average acceleration in each of the time intervals OX, XY and YZ respectively.

• A. -2, 1 , 4
• B. 2, 1, -4
• C. -2, 0 , 4
• D. 2 , 0 , -4

Answer 1

The correct option is D

2 , 0 , -4

Average acceleration = $\frac{FinalVelocity-InitialVelocity}{Time}$

Acceleration in OX$=\frac{12-0}{6}=2$

Acceleration in XY $=\frac{12-12}{12}=0$

Acceleration in YZ $=\frac{0-12}{3}=-4$