## Presentation ~ above theme: "Motion is the readjust in position in a particular amount that time."— Presentation transcript:

You are watching: A change in position in a certain amount of time

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2 movement is the change in position in a certain amount that time.

3 Frames of referral Whenever you define something that is moving, you space comparing it with something that is assumed to it is in stationary, or no moving. The background or object that is offered for compare is dubbed a frame of reference. The most common frame of reference is the Earth, yet no single frame of reference is “correct”.

4 Measuring movement When friend say that something has actually moved, you space describing motion. Rate is the price at which things moves. Speed = speed is the rate at which an object moves. Rate = street Time ●Distance is normally measured in meters or kilometers. Time is usually measured in seconds or hours.

5 constant and typical Speed once speed walk not readjust it is called constant speed. For an object moving at constant speed, the rate at any allude is the exact same as the median speed. For an item whose speed varies, you calculate the typical speed.

6 Velocity one more characteristic offered to define motion is velocity. Velocity is speed in a given direction (the direction in which things moved). Example : The dog ran eastward at 10 m/sec. The dog’s speed is 10 m/sec. The VELOCITY is 10 m/sec east.

7 combine Velocities Velocities that have the exact same direction are included together. Velocities that have opposite directions integrate by subtraction.

8 If you space rowing a watercraft downstream at 16 km/hr and also the flow water is additionally traveling downstream, of course, in ~ 10 km/hr. You would certainly actually be moving at 26 km/hr. (velocities in the very same direction are included together) If you space rowing a watercraft upstream in ~ 16 km/hr and also the water is traveling downstream at 10 km/hr, you room actually relocating at 6 km/hr (opposite directions – subtract).

9 transforms in Velocity The price of readjust in velocity is known as acceleration. If miscellaneous is accelerating, the is speeding up, slow down, or transforming direction. The acceleration of an item is equal to its adjust in velocity separated by the time throughout which this change occurs. Acceleration = final Velocity - initial Velocity Time

10 If over there is a diminish in velocity, the value of acceleration is negative. An unfavorable acceleration is called DECELERATION. As a vehicle comes come a stop, that decelerates, or slowly down.

11 momentum All relocating objects have actually momentum. The much more momentum an object has, the harder it is come stop. Momentum depends on the massive of the object and also the velocity with which the is traveling. Inert is equal to the fixed of an object multiplied by its velocity. Inert = fixed x Velocity momentum = mass x Velocity

12 A 200 lb fullback operation up the middle of the football field. Suddenly he collides with a 175 lb defensive earlier running towards him. The an ext massive fullback is thrown back two yards. HOW have the right to this happen? although he has actually less mass, the defensive back would need to have much more momentum (he would have been running much faster than the fullback) His better velocity renders up for his smaller mass. IF both players had actually the very same velocity, who would have much more momentum? Example…..

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13 conservation of Momentum when the inert of one thing is moved to another object nobody of the inert is shed (conservation the momentum) The full momentum of any group that objects remains the exact same unless exterior forces act on the objects. (conservation of momentum) playing billiards pool; baseball; throwing things off a boat, watercraft goes in the contrary direction;