A bus moving along a straight line at 20 m/s undergoes an acceleration of 4 m/s². After 2 seconds, its speed wil be :

A. 8 m/s B. 12 m/s

C. 16 m/s D. 28 m/s

Derive the following equation of motion by the graphical method : v² = u² + 2as, where the symbols have their usual meanings.

A bus increases its speed from 36 km/h to 72 km/h in 10 seconds. Its acceleration is :

A. 5 m/s²

B. 2 m/s²

C. 3.6 m/s²

D. 1 m/s²

The slope of a speed-time graph gives :

A. distance travelled

B. velocity

C. acceleration

D. displacement

The area under a speed-time graph represents a physical quantity which has the unit of :

A. m

B. m²

C. m s^-1

D. m s^-2