Measuring Motion
An object's change in position relative to a reference point
What is motion?
A push or a pull on an object in order to change the motion of the object
What is force?
A force that opposes motion between two surfaces that are in contact. This force can cause objects to slow down.
What is friction?
The force of attraction between objects due to their masses
What is gravity?
The distance traveled divided by the time taken to travel the distance
What is speed
The combination of all the forces acting on an object
What is net force?
This is the type of friction that occurs between two objects that are moving.
What is kinetic friction?
Gravity is a result of mass, all matter has mass, therefor all matter is affected by gravity. T or F
True
To determine motion you watch an object in relation to another object that stays in place. What is the object that stays in place?
Reference point
The SI unit for force
What is Newton?
This type of friction occurs when a force is applied but the object does not move.
What is static friction?
Which British scientist summarized their ideas about gravity in a law?
Isaac Newton
The gravitational force on Mars is 5 times the gravitational force on Earth. If an object has a mass of 100kg and a weight of 500 N, what is the object's mass and weight on Mars?
Mass of 100kg and weight of 2,500 N
The rate at which velocity changes over time, this is a change in speed, direction, or change
Acceleration
When the forces on an object produce a net force of 0 N. These forces will not cause a change in the motion of an object.
What are balanced forces?
Name one way to reduce friction and one way to increase friction.
Reduce: Lubricant, rolling, smooth surfaces, etc
Increase: Sand, texture, force, etc
Explain the relationship between mass and gravitational force and distance and gravitational force.
Gravitational force increases as mass increases. Gravitational force decrease as distance increases.
Velocity
When the force of an object is not 0 N. These forces produce a change in motion such as speed or direction.
What are unbalanced forces?
List the two types of kinetic friction
Sliding friction and rolling friction
Describe the difference between weight and mass
Weight is a measure of gravitational force on an object, mass is a measure of the amount of matter in an object