Universitas Negeri Jakarta (UNJ) Ge rard Polla: [email protected].
Work Senior High School Class: XI / Semester 1 Created by Dewi Tirtasari Universitas Negeri Jakarta.
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Transcript of Work Senior High School Class: XI / Semester 1 Created by Dewi Tirtasari Universitas Negeri Jakarta.
Work
Senior High SchoolClass: XI / Semester 1
Created by Dewi Tirtasari Universitas Negeri Jakarta
What is mass?
mass is how much “stuff” a thing contains
What is weight ?
weight refers to the rate at which that amount of stuff is being
accelerated towards the earth
Think!!
What difference between
What is WORK ?
When a force acts upon an object to cause a displacement of the object, it is said that work was done upon the object
The equation of Work
Mathematically, work can be expressed by the following equation.
The angle -> Theta (θ)
Keywords of Work
• Force • Displacement• The angle
Practice make perfect
Let’s Mention !
several good examples of work that can be observed in everyday life …
Practice make perfect
Angle Force Distance Work (J)
a. 35 deg 1.12 x 104 N 105 m
b. 45 deg 1.39 x 104 N 84.9 m
c. 55 deg 1.61 x 104 N 73.2 m
Summary
Work is done when a force acts upon an object to cause a displacement. Three quantities must be known in order to calculate the amount of
work. Those three quantities are force, displacement and the angle between the force
and the displacement.
Summary