Question

A car covers 100 m in first 10 s, 80 m in next 10 s, and 150 m in final 10 s. Calculate the average speed of the car. Also, identify whether it is a uniform or non-uniform motion.​

• A. Average speed : 11 m/s, Uniform motion​
• B. Average speed : 11 m/s, Non-uniform motion​
• C. Average speed : 10 m/s, Uniform motion​
• D. Average speed : 10 m/s, Non-uniform motion​

Answer 1

The correct option is B Average speed : 11 m/s, Non-uniform motion​

Average speed = $\frac{\text{Total distance}}{\text{Total time}}$

Average speed= $\frac{100+80+150}{10+10+10}$ = 11 𝑚/𝑠

Uniform motion: Body travels equal distances in equal intervals of time.

Non uniform motion: Body travels unequal distances in equal intervals of time.