If Coach Kampen throws the football 60 meters in 4 seconds, what is the average speed (velocity) of the football?
If it takes Old McDonald 45 seconds to run from the from his house to his barn door at an average speed (velocity) of 3 meters per second, what is the distance he covers in that time?
What is the definition of speed?
How do you find speed?
On a motion graph a steep straight line shows...
The Law of Acceleration.
Pushing a child on a swing requires less force than pushing an adult.
The air is let out of a balloon and it flies around the room.
A baseball continues to roll until friction, gravity, and air resistance stop it.
The Law of Inertia
An object moves when acted on by....
If forces are balanced an object is most likely...
What is the most common contact force?
What is the net force on a box if Joey pushes the box at a force of 50N right and Cody pushes the box at 40N left?
What is net force?
An ant walking 10 millimeters per second.
A train left the station heading towards Dallas at 75 miles per hour north.
A knuckleball pitcher can throw a ball that has varying speeds.
The flight from NYC to Los Angeles travels at 550 mph west each morning
The car slowed down at the train crossing because the crossbars lowered.
How do you find average acceleration?
What is the unit for acceleration?
A train comes to a quick stop, what happens to the acceleration vectors?
What are 4 common examples of acceleration?
A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
15 m/s
150 m
The distance an object travels in a certain amount of time.
s=d/t
a constant fast speed
2
2
3
1
1
unbalanced forces
not in motion
Friction
10N right
The combination of all forces on an object.
speed
velocity
acceleration
velocity
acceleration
(V2-V1)/t
meters per second squared
They are in opposite directions
slowing down, speeding up, stopping, and turning
6 m/s2
