JAMB - Physics (1999 - No. 39)

The diagram above shows the velocity-time graph of a vehicle. Its acceleration and retardation respectively are

8.0 ms^-2, 4,0 ms^-2

4.0 ms^-2, 8.0 ms^-2

4.0 ms^-2, 2.0 ms^-2

2.0 ms^-2, 4.0 ms^-2

Acceleration = slope = ^AE/_OE = ⁸⁰/₂₀ = 4m/s²
∴ acceleration and retardation = 4m/s²; 2m/s²