Units
What are the units for time?
seconds
Acceleration is a change in this over time.
speed/velocity
What two types of motion do we see during projectile motion.
vertical and horizontal motion
An objects horizontal motion is always ________.
ex: final and initial motion/speed
constant, the same
What is speed "at rest"? use units
0 m/s
What are the units for time
seconds
One or both of these two things needs to change in order for an object to accelerate.
speed and direction
On earth, this is the acceleration of an object in free fall.
9.8 m/s2
motion perpendicular to the ground
vertical motion
This is the final velocity of an object as it comes back down if thrown up at 5m/s.
5 m/s.
What are the units for velocity
What is the acceleration of a car going from rest to 60m/s in 30s? include units
2m/s2
How fast has an object in free fall traveled after four seconds if dropped from rest. include units
39.2 m/s
motion parallel to the ground
horizontal motion
Why do objects not in a vacuum fall at different rates?
air resistance.
What is the unit for Acceleration?
m/s^2
What is the acceleration for a bird going from 55m/s to 10m/s in 5s? include units
-9m/s2
How far has an object in free fall traveled after four seconds if dropped from rest? include units
78.4 m
A negative slope on a velocity vs time graph means this kind of movement.
negative acceleration.
A bed and a ping pong ball are dropped in a vacuum from the same height at the same time. Which will hit the ground first?
both at the same time.
What unit would your answer be if you are looking for velocity changing over time?
acceleration- m/s^2
A certain car can go from 60 m/s to rest in 5 s. What is its acceleration? include units
11.8m/s2
How fast is a ball traveling if it is dropped and has been falling for 10s? include units
98m/s
The speed of an object thrown up at its highest point. use untis
0m/s
What is the final speed and height of an object that has been falling for 8 seconds? Use units. DOUBLE POINTS
313.6 m, and 78.4m/s