Science flahscards week 10 Flashcards
Science flahscards week 10
What is work?
Work occurs when you exert a force on an
object that causes the object to move some
distance.
What is work power?
The rate at which work is done.
What is a machine?
A machine js a device that allows you to do
work (Wi) easier or more effectively.
What are levers?
Rigid bar that pivots/rotates on a fixed
point.
What is a Fulcrum?
Fixed point that a lever pivots
around.
What is Mechanical Advantage?
The number of
times a machine increases the input force.
What is efficiency?
compares output work to input work.
An ideal machine’s efficiency.
What is a wheel & axle?
two circular/cylindrical objects
that are connected together and rotate around
a common axis.
What is a wheel?
larger radius object
What is an Axle?
smaller radius object
What is a pulley?
A grooved wheel with a rope (cable)
wrapped around it.
What are the three pulleys?
- Fixed Pulley
- Movable Pulley
- Block & Tackle.
What is a fixed pulley?
Pulley attached to a structure.
What is Movable Pulley?
Pulley attached to moving object.
What is a Block & Tackle?
Fixed & Movable pulley system.
What is a compound machine?
A combination of two or more simple machines.
What is a inclined plane?
flat sloped surface.
What is a wedge?
Two inclined planes back to back that can move.
What is a screw?
An inclined plane wrapped around a
cylinder.
What are The three types of levers?
- First Class Lever
- Second Class Lever
- Third Class Lever
What is Sound energy?
when you transmit energy though sound.Vibrating objects
What is potential energy?
Stored energy.
What is Kinetic energy?
Kinetic energy is the energy an object has because of its motion.
What is chemical energy?
from chemical bonds
What is electrical energy?
moving electrons
What is mechanical energy?
moving things(parts)
What is heat energy?
moving molecules
What us nuclear energy?
From atoms nucleus
what is light(solar) energy?
moving photons
What are renewable Resources?
materials that can be replaced at the rate at which we use them.
what are Nonrenewable Resources?
are materials that can not be replaced at the rate at which we use them.
What are the types of energy?
1.Solar
2.heat
3. Nuclear
4. mechanical
5. electrical
6. chemical
7.Potential
8,kinetic
