Introduction to Physics Lesson 15

Activator 15 minutes of silence (timer up, if students talk it is reset) Read the article Answer the 5 questions at the bottom After the 15 min of independent work is up, take 5 min discuss your answers with a partner We will discuss as a class after

Study of matter and energy Physicist are to find: Physics Study of matter and energy Physicist are to find: describe a complex universe with simple and useful clarifying laws Define the most fundamental measurable quantities (velocity, electric field, kinetic energy) Find relationships between those fundamental measured quantities (Newton’s Laws, conservation of energy, special relativity)

Energy is a measurement of the ability of something to do work Energy and Work Energy is a measurement of the ability of something to do work Energy is never really destroyed Transferred from one form to another

Work Force applied to object  object moves  work is done If the object doesn’t move  no work Force is applied and the object  moves a distance in a direction other than the direction of the force  less work is done

Measuring Energy and Work Standard unit  joule (J) Calorie One Calorie is the amount of energy required to raise 1 kg of water by 1​ Celsius.  The calorie, written with a lowercase c, is the amount of energy required to raise 1 gram of water by 1 Celsius. The Calorie, written with a capital C, is the amount of energy required to raise 1 kilogram of water by 1 Celsius.

Calculating Force Work=Force x distance Jimmy pushes a block 7 meters with a force of 10 Newtons. How much work did he do? 10N x 7M = 70 N per m or Joule Finish the calculations on your worksheet. 15 minutes independently then compare answers with classmates.