Measuring Motion
What is motion
an object's change in position relative to a reference point
What is force
a push or a pull
What is gravity?
a force of attraction between object that is due to their masses
What is friction
a force that opposes the motion between two surfaces that are in contact
What is free fall?
the motion of a body when only the force of gravity is acting on the body
What is velocity
The speed of an object in a particular direction
newtons
the SI for force
what is weight?
a measure of the gravitational force exerted on an object.
What causes friction?
When two surfaces touch, the hills and valleys of one surface stick to the hills and valleys of the other. This contact between surfaces causes friction.
What is terminal velocity?
the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity
what is acceleration
The rate at which velocity changes over time
What is net force
the combination of all of the force acting on an object
What is mass?
how much matter is in an object.
what are the types of friction
Kinetic Friction and Static Friction
What does orbit mean
An object is in orbit (is orbiting) when it is going around another object in space.
What is speed
the Distance traveled divided by the time interval during which the motion occurred.
What is balanced force
the forces are are balanced
what is the SI unit for weight
Newtons
How can friction be decreased?
by adding a lubricant.
How Can You Calculate How Long an Object Was Falling?
time =velocity (divided by) gravity
how do you determent average speed
total distance divided by total time
What is a unbalanced force
A force that is grader force than the object
What is mass measured in
grams
How can friction be increased on ice
salt and sand
What Is Projectile Motion?
the curved path that an object follows when thrown, launched,