Motion
All motion has a reference point. In everyday life, that reference point is _____
Earth's surface
Distance an object travels per unit of time
Speed
When an object falls on earth with no air resistance, its acceleration is __________
10 m/s2
(!) The rate at which velocity changes with time
Acceleration
Which has greater acceleration: a car going from 50 km/h to 60 km/h, or a bike from rest to 10 km/h in the same time?
They have the same acceleration.
Which measures the length of a path between two points?
Distance
The rate and which a given object is moving at a given instant in time
Instantaneous Speed
How much gain in speed does a freely falling object acquire each second?
10 m/s
An object travels at a constant velocity. What is the acceleration?
zero
If you throw a rock straight up and catch is when it comes back down, how does its speed compare to the speed at which you threw it?
Same
An object will only fall at a constant speed when...
it has reached terminal velocity (air resistance equals pull of gravity)
The formula to calculate velocity (or speed if direction doesn't matter)
v=d/t
What is the acceleration of a freely falling object after 5 seconds of falling from rest?
10 m/s2
Give an example of acceleration's unit of measurement
m/s2 (or any example that has the time squared)
A vehicle accelerating in a straight line at 2 km/h*s has a speed of _______ at 2 seconds.
4 km/h
What formula should you use to find the time it will take an object to fall from rest given its height?
t=sqrt((2d)/a
(!) Speed in a given direction
Velocity
What is the appropriate formula for measuring how far an object falls from rest?
d=1/2g t^2
List three ways acceleration can change
speeding up, slowing down, changing direction
A freely falling object with a speedometer would show a speed of ______ after 2 seconds
20 m/s
What formula should you use to find how far a projectile will travel if you already know its initial horizontal velocity and its drop time?
d=vt
What is the speed of an object that travels 1 meter is 0.5 seconds?
2 m/s
An object falling for 5 seconds has traveled a total distance of ________
125 meters
A runner accelerates at 2 m/s2. How long will it take to reach a speed of 12 m/s?
6 seconds
When a freely falling object reaches a speed of 10 m/s, it has fallen a distance of ________
5 meters