4.7.1.1 The speed of a moving Define speed and 0.5 Discussion questions How fast do people walk object is rarely constant. calculate it by using and run? Students are What is the speed of When people walk, run or timed walking a known sound? Teachit Science travel in a car their speed is distance and then their What factors change the that speed is a resource constantly changing. speed is calculated. This speed of sound? scalar quantity. can then be extended to The speed that a person can Can we measure the them running the same Describe the walk, run or cycle depends speed of sound in school? distance so their times difference between on many factors, including Research the speed of sound can be compared. average and age, terrain, fitness and and the factors that affect it. instantaneous speed. distance travelled. How can we find out if cars on the road are Explain why the of Typical mean values are: speeding? a moving object is walking 1.5 m/s nearly always Investigate the speed of running 3 m/s changing. vehicles on roads this – cycling 6 m/s. can also be done with Describe and explain It is not only moving objects trolleys in a lab using the factors that affect that have varying speed. The data loggers and light how quickly a person speed of sound and the gates. can walk or run. speed of the wind also vary. Research methods used State typical walking, A typical value for the speed by the police/ council to running and cycling of sound is 330 m/s. determine whether speeds in m/s. motorists are speeding.
4.7.1.1 The speed of a moving object is rarely constant. When people walk, run or travel in a car their speed is constantly changing. The speed that a person can walk, run or cycle depends on many factors, including age, terrain, fitness and distance travelled. Typical mean values are: walking 1.5 m/s running 3 m/s cycling 6 m/s. It is not only moving objects that have varying speed. The speed of sound and the speed of the wind also vary. A typical value for the speed of sound is 330 m/s. Define speed and calculate it by using that speed is a scalar quantity. Describe the difference between average and instantaneous speed. Explain why the of a moving object is nearly always changing. Describe and explain the factors that affect how quickly a person can walk or run. State typical walking, running and cycling speeds in m/s. 0.5 Discussion questions What is the speed of sound? What factors change the speed of sound? Can we measure the speed of sound in school? Research the speed of sound and the factors that affect it. How fast do people walk and run? Students are timed walking a known distance and then their speed is calculated. This can then be extended to them running the same distance so their times can be compared. How can we find out if cars on the road are speeding? Investigate the speed of vehicles on roads – this can also be done with trolleys in a lab using data loggers and light gates. Research methods used by the police/ council to determine whether motorists are speeding. Teachit Science resource