作者:Vincent Esmena 12 年以前
3055
Force,Work,Power,Energy
Force,Work,Power,Energy
Energy
how to measure energy?
Potenital= MxGxH
What types of energy are there?
there are eight types of energy kinetic, potential, Nuclear,Sound,Light,Electrical,Chemical and Heat
What is energy?
energy cannot be distroy it can only be changed
energy is the capacity of work done
Power
what is the SI unit for Power?
Watt (W)
How to measure power?
Power=energy/time
what is power?
power is the rate of doing work/ transfer energy
Subtopic
Work Done
how to measure work done?
Force = WxD ((weigth x 10)N x Distance Moved = Joule
What is work done?
work done cane only happen when the force and the object are moving in the same direction
what is the SI unit for work done?
Joule
Force
force has a SI unit
how do we measure force?
we can measure force by using a weighting scale or a spring balance
Spring Balance
weighting scale
What is force?
force is a push/pull
force can cause effects
it can change its shape/size, speed, direction and can start/stop a object