Choose the incorrect match and give reasons for your answer.
1. m/s - velocity
2. m/s^2 - acceleration
3. light year - distance
4. m^2/s - displacement
Draw the displacement-time graph for the values given below. Displacement after 1 s,2 s,3 s and 4 s are 5 m,10 m,15 m and 20 m respectively. [2 MARKS]