Define
It is the ability to do work
energy
What is the formula to calculate work done?
W = F x d
If a force of 1N makes a pencil case move by 1 m then the Work done by the force is?
1 Joule
The force that acts on everything on earth is called ______
gravitational force
Is balancing a book on your head called work?
no
The parts of a system are called
_____________
components
What is the unit of work?
Joule
If F = 10 N
d = 2 m
Work done = ?
20 Joules
___________ is credited for discovering gravitational force.
Isaac Newton
Work equation
W = Force x distance
What is force defined as?
A push or pull that can cause movement
If Work is calculated in Joules, then force is calculated in ___________
Newtons
If Mehar applies force to lift her backpack that weighs 20 kg to a height of 2 m, how much work has she done ?
40 Joules
Name one input of the system : camera
Light, chemical energy
Newton - m is the unit of ________ ?
Work
What is a system?
A structure that has parts that are connected and influence each other in some way
4 m = ___________ cm
400
If Mrs. T who weighs 60 kg runs a distance of 500 cm then the work done by her muscles is ?
300 Joules
The actions, taken by the system, that allow it to convert the input to the output are called _______
processess
Work and Energy can be calculated in the same way. True or False?
True
What is work defined as?
The transfer of energy through motion
Name the two physicists after who the units are named in the equation W=F x d
Issac Newton
James Joule
Define 1 Joule
It is the work done when the force of 1 N moves an object by 1 m.
Name one input and one output of this mechanical system : clock
Input - chemical energy ( batteries)
Output - mechanical energy, movement
If Hartej pulled a rope during tug of war with a force of 5 N and the rope moved by 2 m, then how much energy did he have to use to do the work?
10 J