# Length, Time & Motion Welcome to the GCSE Physics Ninja Length, Time & Motion course.

These video lessons are based on question-and-answer flashcards. You can either make your own or purchase the printable flashcards from the shop.

 Measuring Quantities Velocity-time graphs 1. Measurement units and quantities 18. Gradient of a velocity-time graph 2. Power of ten notation 19. Describing motion in a velocity-time graph 3. Measuring short time intervals 20. Skydiver velocity-time graph 4. Measuring length, volume and time 21. Acceleration gradient calculation 5. Using a micrometer screw gauge 22. Distance travelled from a graph 6. Density calculation 23. Distance travelled calculation 7. Gold nugget density calculation 24. Freefall acceleration 8. Density of lead vs. mercury Circular motion Motion equations 25. Moving in a circle 9. Speed vs. velocity 26. Circular motion examples 10. Average speed equation 27. Direction of centripetal force & acceleration 11. Average speed calculation 28. Whirling a ball on a string 12. Acceleration equation Simple pendulum 13. Acceleration-calculation 29. Simple pendulum time period & frequency Distance-time graphs 30. Simple pendulum calculation 14. Gradient of a distance-time graph 31. Simple pendulum time period and length 15. Describing motion in a distance-time graph 32. Simple pendulum measurements 16. The gradient of a straight line Velocity vectors 17. Calculating speed from a distance time graph 33. Quantities with magnitude and direction 34. Finding a resultant vector

## What will I learn in this course?"

When you have completed this course, you will be able to...

• Become familiar with the quantities and units used to measure length, time and motion.
• Measure short time intervals with reasonable accuracy.
• Use a micrometer screw gauge to measure very small lengths.
• Measure and calculate the density of a substance.
• Understand how to interpret distance-time graphs and velocity-time graphs.
• Calculate distance travelled, speed and acceleration of an object using a graph, or an equation.
• Explain how objects can move in circular motion.
• Perform calculations on simple pendulums.
• Understand what vectors are, and how to find a resultant vector graphically.