Speeding Up .Shristi
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- 2. The runners were stationary ,when the starter gun fired, so they began to drive fast or accelerate .speed is the steady rate of movement over distance.
- 3. speed records LAND SPEED RECORDS date speed driver car 15/10/97 1227.99 Andy Green Thrust ssc 4/10/83 1010.47 Richard Noble Thrust 2 23/10/70 995.85 Gary Gabelick The blue flame 15/11/65 960.96 Craig Breedlove Spirit of America 7/11/65 922.48 Art Arfan Green monster
- 4. Ways of measuring speed There are 5 ways of measuring speed- The speedometer, The speed trap gun, The stop watch, The light gates, The distance/ time graph.
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- 9. Velocity When something moves it goes in a particular direction. An airplane for example ,may move at 900 km/ h in a direction due north. The speed and the direction of the movement when given together are called velocity.
- 10. Acceleration The acceleration of a moving objects is a measure of how itās velocity changes in certain interval of time. The following equation shows how the steady acceleration of an object can be calculated. Acceleration= change in velocity time
- 11. Friction This contact force occurs between two objects when there is a push or a pull on one of the objects which could make it move over the surface of the other object. Friction works to oppose that movement . A push or a pull on the object increases, the force of friction between the surface of the other object .Friction acts to oppose that movement.
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- 21. There are 4 types of circular motions:- Spinning Object Moving Earth The moving of the Moon Jupiterās Gravity
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