Unit V - Force & Motion Flashcards
Acceleration
the change in speed of an object in a given time
Action
the force one object applies to a second (as in Newton’s third law of motion)
Balanced forces
forces that cancel each other out when acting on an object together
Center of mass
the point where the distribution of an object’s mass is centered
Collision
when two or more objects crash into one another
Deceleration
negative acceleration (slowing motion)
Force
a push or pull of one object on another which can change the motion of that object
Friction
the force that resists the motion of one object over another
Gravity
the force that causes two masses to be attracted to one another
Gravity
the force that causes two masses to be attracted to one another
Inertia
the tendency of an object to remain in its state of motion or rest unless acted on by an outside force
Matter
the amount of matter in an object
Motion
the change in position, direction, or speed of an object with respect to a reference point
Net force
the total combined force acting on an object
Position
an object’s location
Reaction
the force with which an object responds to an action (as in Newton’s third law of motion)
Speed
the rate at which an object moves a certain distance in a given time
Unbalanced forces
forces that do not cancel each other out when acting on an object together
Weight
the amount of force that gravity has on an object’s mass
How do you calculate the speed of an object in motion?
Find the unit rate for each slope, divide by how many groups there are.
Formula for acceleration
acceleration = final speed - inital speed / time
Newton’s First Law
An object in motion will stay in motion and an object at rest will stay at rest unless an opposing force acts on it
Newton’s Second Law
F = MA
Newton’s Third Law
For every action, there is an equal (in size) and opposite (in direction) reaction force
Example of Newton’s Third Law
When a person is jumping, the person uses his legs to jump, whereas the floor is pushing the guy off.
Example of Newton’s First Law
When an clip is above an index card which is above a cup and the index card is rapidly taken away, gravity pulls the clip down causing it to fall.
