Vocab/key concepts
Mass
the amount of matter that makes up an object
If two objects in a collision have the same masses, how are they affected.
They change velocity by the same amount.
The forces in a collision are what?
They are the same strength and go in opposite directions.
What is Newton's first law?
The law of inertia.
Collision
the moment when two objects hit each other
If two objects in a collision have different masses, then the changes in velocity will be same/different.
When two objects with different masses collide, which object receives a greater change in velocity?
The object with the lower mass.
What is Newton's full name?
Isaac Newton
when two objects collide what happens?
It stops moving.
Why is a wrecking ball more effective in demolishing buildings than a yoyo?
What is the formula to find the strength of a force.
Force = mass*acceleration
Do the forces in a collision have the same strength?
Yes
If a golf ball hits a rubber ball, which ball experiences a greater change in velocity?
The rubber ball experiences a greater change in velocity.
If the pod's mass was 1,100 kg, and the space station's mass was 415,400 kg, which object would be more affected in a collision?
The pod
How fast is the Earth spinning?
Over 1,000 mph.
Even though the force exerted on each object in a collision is the same strength, if the objects have different masses, their changes in velocity will be ---.
different
What is a collision?
The moment when two objects hit each other
What happened to the pod when communication was lost?
The pod's mass was larger than the masses of other pods, so the thruster force wasn't sufficient enough to stop the pod, meaning that the pod still moved in the same direction and collided with the space station and bounced off.
How has the earthquake in Japan affected the Earth?
It caused days to be 1.8 microseconds shorter.