Forces
What is a push or pull?
Force
What is a force that acts to resist sliding between two touching surfaces
friction
Fill in the blank... Newton's 1st Law of Motion states that if the force acting on the object is zero, the object will remain at ______, or if the object is in ______, it will continue in a straight ______with a ____ speed
Newton's 1st Law of Motion states that if the force acting on the object is zero, the object will remain at rest, or if the object is in motion, it will continue in a straight line with a constant speed
What states that for every action, there is an equal and opposite reaction?
Newton's 3rd Law of Motion
Give your own example of action reaction force pairs
Answers may vary.
What is the combination of all forces acting on an object?
Net Force
What occurs when an object rolls across a surface
rolling friction
Applying the breaks uses what kind of friction
sliding friction
You throw a ball against the wall, the reaction is...
the ball pushes against the wall
What is the force that keeps everything on the ground
gravitational force
What is two or more forces acting on an object and cancelling each other out?
Balanced Forces
What is the force that exists between any two objects that have mass
gravity
What occurs any time an object speeds up, slows down, or changes direction in it's motion
acceleration
How long does it take for an action reaction situation to happen
it happens instantly
If the net force of an object acts at an angle to the direction an object is moving the object will follow a ____path.
(Example: throwing a basketball)
curved
When forces on an object do not cancel and the net force is not zero this is called ________.
Unbalanced Forces
What kind of friction prevents an object from moving
Static Friction
What states the acceleration of an object equals the net force divided by the mass and is in the direction of the net force?
Newton's 2nd Law of motion
What is the gravitational force of any object near Earth's surface? (random equation)
9.8m/s2
What is the net force of a circular moving object called?
centripetal force
When the net force equals zero, what kind of force is this?
balanced force
What is it called when the air resistance balances the force of gravity and the object falls at constant speed
terminal velocity
What is the size of the gravitational force exerted on an object?
weight
If this happens with objects that are different masses, objects will move.
What is a form of friction that acts to slow down any object moving in air
air resistance