Definitions and Concepts
This is a change in position of an object
What is displacement?
You’re walking at 1.5 m/s in a straight line for 10 seconds. This is your displacement
What is 15 meters
A straight horizontal line on a position vs time graph means this
What is constant velocity?
An object moves at 3 m/s for 4 seconds its, displacement is this
What is 12 meters
An object moving with constant speed must have this acceleration.
What is zero?
This is rate of change of velocity
What is acceleration?
A car moving at a constant 20 m/s takes this long to go 100 meters.
what is 5 seconds?
Curved line on position vs time graph means this
What is acceleration?
A ball falls from rest. After 2 seconds, its velocity is this. g= 9.8 m/s ^2
What is 19.6 m/s?
If acceleration is negative, the object must be doing this..
What is slowing down?
Quantity that has both magnitude and direction
What is a vector?
A ball dropped from a building hits the ground in 3 seconds this is its velocity just before hitting.
What is 29.4 m/s
Slope of velocity-time graph represents this
What is acceleration
A car accelerates from 10 m/s to 30 m/s in 5 seconds, its acceleration is this.
What is 4 m/s^2
If velocity and acceleration are in opposite directions, this happens.
What is deaccleration?
Area under a velocity-time graph
What is displacement?
A sprinter accelerates from rest at 3 m/s². This is how far she runs in 4 seconds.
what is 24 meters?
On velocity-time graph, horizontal line at zero means this
what is object at rest
If an object starts at rest and accelerates at 2 m/s² for 6 seconds, it travels this far
What is 36 meters
Two objects dropped from different heights hit the ground at the same time only if this is true
What is they are released at the same time from the same height?
This is the term for motion under constant acceleration due only to gravity.
What is free fall?
A train slows from 30 m/s to a stop in 60 seconds. This is the magnitude of its acceleration.
What is .5 m/s^2
area under acceleration-time graph
what is change in velocity
A rock is thrown vertically upward with a velocity of 20 m/s, the time to reach the peak is this..
What is 2.04 seconds?
An object is thrown upward and returns to the same height, the average velocity for the round trip is this
What is zero?