Describe and explain the motion of a skydiver when they jump from the aircraft, when they are opening their parachute, and when they are stationary on the ground. You might find it helpful to sketch a speed—time graph before you begin to write your answer.
Important Questions on Describing Motion
One way to find the speed of an object is to measure the time it takes to travel a measured distance. The table shows the three quantities involved.
Complete the table as follows:
In the second column, give the SI unit for each quantity (name and symbol).
In the third column, give some other, non-Sl, units for these quantities.
In the fourth column, name suitable measuring instruments for distance and time.
| Quantity | SI unit (name and symbol) | Non SI units | Measuring instrument |
| Distance | |||
| Time | |||
| Speed |
The table shows the time taken for each of three cars to travel . Write the name of the fastest car. Complete the table by calculating the speed of each car. Give your answers in and to one decimal place.
| Car | Time taken | Speed |
| Red car | seconds | |
| Green car | seconds | |
| Yellow car | seconds |
