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# Motion

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### Motion

1. 1. Some objects in our surrounding are moving with respect to the stationary ones. Based on that object or body in our surroundings, our environment can be classified as :- • Stationary Objects ( in rest ) • Moving Objects ( in motion ) CONCEPT :-
2. 2. A body is said to be in motion when it’s position changes continuously with respect to reference point (stationary object). • E.g.:- hand of the clock are in motion. Reference point :- • When a car moves in front of a forest • With respect to the trees car is moving. • Trees – reference point MOTION
3. 3. Scalar : • Gives only magnitude Vector : • Give both magnitude and direction Vector and Scalar e.g. Scalar Vector
4. 4. A body travels in uniform motion when it travels equal distance in equal interval of time. A body travels in Non uniform motion when it travels unequal distance in equal interval of time. Uniform and Non Uniform motion UniformNon Uniform
5. 5. Speed:- distance travelled by a body per unit time ………. speed = distance/time Speed is scalar Speedometer and Odometer are used to measure speed of an object Speed
6. 6. Average speed :- The average speed of a body is the total distance travelled by the total time taken. Average Speed = Total distance traveled / Total time taken Average and Uniform Speed
7. 7. Velocity :- distance travelled by a body per unit time in a given direction…… VELOCITY = displacement / time Velocity is vector. Direction of a body is as displacement at the body. Velocity
8. 8. Uniform Velocity
9. 9. Average Velocity
10. 10. Acceleration •The rate of change of velocity of an moving object is known as its Acceleration. •It is a vector quantity. •Acceleration = Velocity/Time •It’s unit is m/sec2.
11. 11. Retardation
12. 12. - Prateek Saxena 9th B 14