Forces And Energy Flashcards
What is an unbalanced force
Forces acting in opposite directions that aren’t equal in size
The object will either speed up or slow down
What is a balanced force
Two forces acting in opposite directions to an object and equal in size
The object stays stationary or moves at a constant speed
What is air resistance
Is a force caused by air
The force acts in the opposite direction to an object moving through air
What is solar energy
Energy used directly from the sun
What is wind Energy
Energy is used to make windmills turn to make electricity
What is biomass
Plant and animal material contains stored energy
What is wave energy
The up and down movement of the sea can be used to make electricity
What is hydroelectric energy
Energy from the downward movement of water
What is fossil fuel energy
Energy stored in the remains of plants and animals that have been preserved for millions of years
What is friction
Force caused by two surfaces moving over each other rough surfaces produce more friction than smooth surfaces
When more than one force act upon an object the forces combine to form a what
Net force
