Intro to Movement
This stationary thing can be used to tell if something is moving.
What is a reference point?
This is the formula to calculate speed.
What is speed=distance / time?
Newtons first law states that an object in this will stay in it until acted upon by an unbalanced outside force
Motion
Newton’s second law states that the force required to accelerate an object depends on its
Mass and current acceleration
In Newtons Third Law he states that every action has a…
Equal and opposite reaction
Jimmy ran 3 miles in half an hour, what is his average speed
6mph
This is the formula used to calculate distance
What is distance=speed x time
Name an animal with great inertia
Answers may vary
Which will need more force to achieve the same acceleration: a 2,000 KG whale or a 500 kg shark
The whale
Two things acting in force on each other are called
Action reaction pairs
This is the term for the distance an object moves in a set amount of time in a certain direction
Velocity
A line on a speed graph is horizontal tells us this
That the object moved at a consistent speed
Inertia is based on the speed of an object and this
Its mass
The formula for acceleration is
Acceleration= Force / Mass
We can use reaction action pairs to create safety and useful things such as
Helmets, crumple zones, and rockets
Acceleration is used to show these two things
What is something speeding up or slowing down?
This is the formula used to calculate acceleration
What is Acceleration=(final velocity-starting velocity) / time
When a skater pushes off on the ice she will ____ until she is acted on by an __________
Move, unbalanced force
Jimmy kicks a soccer ball that has a mass of 2 kg with 30 N of force what is the ball’s acceleration
15 m/s
A dog pulls on the leash and due to Newtons third law
The leash pulls back on him
Acceleration is a measure of the changes of this over a set amount of time
Velocity
A line on a speed graph is horizontal tells us this
That the object moved at a consistent speed
The tendency of an object to keep moving is this
Inertia
Jimmy hits a softball that has a mass of 0.5 kg with 100N of force. Friction works against it with 20 N. What is the ball’s acceleration
160 m/s
A kid cannonballs into the pool and sends up a splash of water. Explain the action reaction pair
Action kid hitting the water, reaction the spraying splash