Energy and work
Give 3 examples of types of energy
mechanical. thermal, nuclear, chemical, electromagmetic, sonic, gravitational, kinetic, potential
Unit of work
Joules
2 examples of kinetic energy
walking, moving, runing, falling, throwing a ball, etc. Any object in motion.
Mechanical energy is
energy doe to its motion, shape and position. Kinetic and potential energy
What is energy?
The ability to cause change
How do we calculate power?
work divided by time
formula for gravitational potential energy
m times h
where m is mass and h is height
Name the two types of nuclear energy
fission and fusion
What is displacement?
When an object moves from a place to another
Unit of power
Watts
What factors affect kinetic energy?
Speed and mass
the transfer of energy into thermal energy
Name the 4 types of motion
rectilinear, circular, rotational and periodic
You try to open a jar and use a lot of force but it doesn´t open, are you doing work?
what is elastics potential energy?
When something can compress or stretch
Is a form of potential energy because it results from relative position of particles within a material. It need to break bonds.
Chemical energy
How do we calculate work?
force times distance
John is 60 kg and he runs up to 12m in 40 seconds. Calculate his power.
18 W
Supppose a girl with a mass of 50 kg is jogging at a speed of 2 meters per second(m/s). What is her kinetic energy?
100 J
A type of energy that need a medium and its particles are always in movement, thanks to their charges.
Electric energy