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

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

1 2 motion is the readjust in place in a certain amount the time. 3 Frames of referral Whenever you define something the is moving, you space comparing it v something the is suspect to be stationary, or no moving. The lift or object the is offered for to compare is called a structure of reference. The most common frame of recommendation is the Earth, yet no single frame of referral is “correct”. 4 Measuring motion When friend say the something has actually moved, you space describing motion. Rate is the rate at which things moves. Speed = rate is the rate at which an object moves. Speed = street Time ●Distance is typically measured in meter or kilometers. Time is normally measured in seconds or hours. 5 continuous and mean Speed once speed go not readjust it is called constant speed. For an object moving at continuous speed, the rate at any allude is the same as the mean speed. For an object whose speed varies, you calculation the mean speed. 6 Velocity an additional characteristic used to describe motion is velocity. Velocity is rate in a offered direction (the direction in which an item moved). Example : The dog ran eastward at 10 m/sec. The dog’s speed is 10 m/sec. That VELOCITY is 10 m/sec east. 7 combine Velocities Velocities that have actually the same direction are added together. Velocities that have opposite directions incorporate by subtraction. 8 If you space rowing a watercraft downstream at 16 km/hr and the flow water is additionally traveling downstream, that course, in ~ 10 km/hr. You would certainly actually be relocating at 26 km/hr. (velocities in the very same direction are added together) If you room rowing a boat upstream in ~ 16 km/hr and also the water is traveling downstream at 10 km/hr, you space actually moving at 6 km/hr (opposite direction – subtract). 9 alters in Velocity The rate of readjust in velocity is known as acceleration. If other is accelerating, it is speeding up, slowly down, or changing direction. The acceleration of an object is same to its readjust in velocity split by the time during which this adjust occurs. Acceleration = final Velocity - initial Velocity Time 10 If there is a decrease in velocity, the value of acceleration is negative. Negative acceleration is referred to as DECELERATION. As a vehicle comes come a stop, that decelerates, or slows down. 11 momentum All relocating objects have momentum. The much more momentum an item has, the harder the is come stop. Momentum relies on the mass of the object and also the velocity through which that is traveling. Momentum is equal to the massive of things multiplied by its velocity. Inert = mass x Velocity inert = mass x Velocity 12 A 200 pound fullback operation up the center of the soccer field. All of sudden he collides through a 175 lb defensive earlier running towards him. The more massive fullback is thrown earlier two yards. HOW can this happen? return he has less mass, the defensive back would have to have an ext momentum (he would have actually been running faster than the fullback) His better velocity provides up for his smaller sized mass. IF both players had actually the very same velocity, who would have much more momentum? Example…..

See more: What Does The Prefix Fore Mean ? Study The Word List: Prefix Fore 13 conservation of Momentum when the momentum of one thing is transferred to one more object no one of the momentum is lost (conservation the momentum) The complete momentum of any type of group of objects remains the very same unless external forces action on the objects. (conservation that momentum) play billiards pool; baseball; throwing things off a boat, boat goes in the opposite direction; 