Physics 2 Flashcards
What is a lever?
It’s an example of a simple machine. A simple machine is anything that can be used to make effort easier to do.
What’s a pivot?
A fixed point around which the lever turns.
What’s a load?
Force you want apply a force to.
What’s an effort?
Force applied by you.
What’s a force multiplier?
They reduce the effort needed to move the load by increasing the distance over which it’s acting.
What can you use the energy in water waves for?
electricity
If the object doesn’t move ….
there is no work
What happens when you heat things up?
Heating changes the movement of particles by making them vibrate more and faster.
The energy you need to increase the temperature of a material depends on…..
the mass of the material and how much the temperature needs to rise.
What is thermal conductivity?
A measure of how easily energy can pass through material.
What’s a conductor?
Thermal energy is transferred easily.
What’s an insulator?
Do not transfer thermal energy easily.
When trying to trap heat…
conductors aren’t good.
What is a sound wave?
They transfer energy. They work by vibrating a medium, usually air, backwards and forwards to produce different frequencies which our ears hear as sound.
What do longitudinal waves need?
they need particles to transfer energy.
