Vocab
velocity
the speed of something in a given direction.
What is required to change the velocity of an object?
a force is required to change the velocity of an object
Is the force same in a collision?
when two objects colide, a force is exerted on each object. the two forces are exerted in opposite directions, but they are the same strength.
how do you create a friction-less surface?
you have to make the surface as smooth as possible.
mass
the weight of an object
exert
to do a motion on something
What determines how an object changes velocity?
how an object changes velocity depends on the direction of the force exerted on that object.
What determines the different change in velocity?
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.
are forces always the same in a collision?
yes
infer
deduce or conclude (information) from evidence and reasoning rather than from explicit statements.
cause
to create something
What can cause a greater change in velocitY?
a stronger force can cause greater change in velocity.
if you leave a stationary object alone, will it move?
no
how can you create a collision?
same force on each object and make them crash.
effect
the aftermath of the cause
friction
a force that stops objects from going further
what can help you to infer what led to a particular result?
understanding a cause and effect relationship can help you infer what led to a particular result
Does energy have anything to do with force?
yes, energy creates force.
If you collide with a massive object, and with a light one, which one will have the biggest effect on velocity?
the lighter object
claim
an scientific opinion supported by evidence
collision
when two objects colide
Will the lighter or heavier object have a greater change in velocity?
if the same strength force is exerted on two objects but the objects have different masses,. the object with less mass will have a greater change in velocity.
how can you move an object?
apply force to it.
what is a rule about heavier objects?
it takes as much as strength to move the object as the object is heavy.
reasoning
a link between evidence and claim.