A train took $11.5 \mathrm{minutes}$ to travel $10 \mathrm{km}$ from station A to B. It stopped at station B for $30 \mathrm{seconds}$ then took another $24 \mathrm{minutes}$ to travel $20 \mathrm{km}$ from station B to C. What was the average speed of the train?

A bus takes $15 \mathrm{hours}$ to travel from town X and Y and $12 \mathrm{hours}$ to travel from town Y to Z.

Calculate the speed of the bus from town 'X' to town 'Y'.

A bus takes $15 \mathrm{hours}$ to travel from town X to town Y and $12 \mathrm{hours}$ to travel from town Y to Z.

Is the speed of the bus increasing or decreasing from town 'Y' to 'Z' as compared to the speed from 'X' to 'Y'? Find out.

A bus takes $15 \mathrm{hours}$ to travel from town X to town Y and $12 \mathrm{hours}$ to travel from town Y to Z.

What is the average speed of the bus throughout journey?

Look at the diagram of a simple pendulum. The bob of the pendulum is released at point 'X'. The period of the oscillation is found to be $0.25 \mathrm{s}$.

Calculate how long it takes for the bob of the pendulum to swing from X to Y.

Look at the diagram of a simple pendulum. The bob of the pendulum is released at point 'X'. The period of the oscillation is found to be $0.25 \mathrm{s}$.

State one measure you can take to ensure that the measurement of the time period of the pendulum is as accurate as possible.

Look at the diagram of a simple pendulum. The bob of the pendulum is released at point 'X'. The period of the oscillation is found to be $0.25 \mathrm{s}$.

Can you change the time period of the pendulum? How?