Vocab
Force
A push or pull on an object. Measured in Newtons (N).
Mass
The amount of matter in an object (measured in grams or kilograms).
Do forces occur by themselves, in pairs, or in groups of three?
In pairs
What can increase the amount of gravitational potential energy?
Height and mass of object
Net Force
The overall force acting on an object after all forces are combined.
Kinetic Energy (KE)
The energy of motion.
What type of force results in motion?
Unbalanced
Law of Conservation of Energy?
Energy cannot be created nor destroyed
Balanced Forces
Forces that are equal in size and opposite in direction; net force equals zero.
Potential Energy (PE)
Stored energy due to position or condition.
What do the arrows represent in a force diagram?
Size and direction of force
What is elastic potential energy?
Energy stored when objects are stretched or compressed.
Unbalanced Forces
Forces that are not equal; cause a change in motion.
Gravitational Potential Energy (GPE)
Energy stored because of height above the ground.
Kinetic energy depends on what two things?
Mass and speed
If a textbook is pushing down on a table, then the table is also...
Newton’s Third Law of Motion
For every action force, there is an equal and opposite reaction force.
Energy Transfer
The movement of energy from one object or system to another.
Kinetic energy equation?
KE = 1/2(mass)(speed^2)
If an object has a force of 2N pulling it left and 4N pulling it to the right, what is the net force?
2N