13 terms

# Science Newton's First Law

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distance
the path an object travels.
speed
the distance traveled divided by the time beeded to travel: example- a wagon travels at 4.6km.
instantaneous speed
speed at any given moment in time: an example- the speedometer of a car reads 55km.
velocity
speed with direction: for example- a wagon travels north at 4.6 k/m.
acceleration
if an object changes it's speed, direction or both, it accelerates: example: - a horse speeds up runs around a track, then slows to a stop.
displacement
the distance and direction between a start and stop point. example: a office leavea the office, deleivers messages around the school, and ends up back where she started.
motion
how an object changes position.
relative motion
how something changes postion in terms of a reference point, Example: a dog sitting next to a door of a house and five minutes later the dog is 10m away from the door.
constant speed
speed is that always the same: example - when a car is set on cruise control.
average speed
the total distance traveled by how long it took you to get there: example- a hiker walks at 5km/h
Explain the difference between displacement and distance and give an example?
Distance explains the path that something travels on. Displacement explains both the distance and the direction the person moves from beginning to end. For example, a runner will run around a track for a certain distance.
how can you tell whether an object has changed positions?
You can tell if an object has changed position by where it's located to a fixed reference point. An example would be if I picked up the laptop from the chair, and then put it on another chair on the other side of a table, which is a fixed reference point.
Describe a balls acceleration when you toss it up high into the air.( explain how it moves, when the speed is the slowest, when the ball stops, and when the speed is the fastest.)
The ball's acceleration is how it changes its speed and direction. When the ball is traveling up the speed is the slowest. When it falls, the speed will increase. The acceleration stops when it hits the ground.