Energy and Change Flashcards
Describe force.
Force is an action that can be described as a push, pull or twist.
Name three things force can change.
Force can change the shape, speed and direction of a object and can also rotate a object.
Name the unit force is measured in.
Newtons
What are the main types of forces?
Contact and non contact (field) forces.
Name all the contact forces.
Friction force
Tension force
Compression force
Name all non-contact (field) forces
Gravitational force
Magnetic force
Electrostatic force
Define weight.
A measure of gravitational force exerted on a material in a gravitational field.
Define Mass.
A measure of how much material is in a object.
Give the formula to calculate weight.
weight = (mass)(9,8 mis)
Define cell.
A system in which certain chemical reactions can cause the flow of electrical charge.
Define system.
A set of parts that work together to carry out a overall function.
Define Electrode
A terminal which a electric current enters or leaves a cell.
Define voltage
Amount of energy a cell gives.
Define rheostat
A variable or adjustable resistor
Name the factors that effect resistance
Type of material used
Length of conductor
