1-26+David+Vasisko

Objectives: New Seats Midterm ( Midterm and Marking Period 2 Grades are posted) New TPJ schedule Work Questions
 * Mr. Manning will be out tomorrow for class and we will have a substitute.

These question were posed by Mr. Manning to see if we could tell if they intended to use the everyday work and the scientific work. Answers will be discussed tomorrow in class. My answers were: 1) Everyday 2) Everyday 3) Science 4) Everyday 5) Science 6) Everyday 7) Science 8) Science

Work: Work is defined by have a force on the object and movement because of the force. Work can be found in two ways: 1) Work = Force*Displacement 2) Work = Absolute value of Force * Absolute value of Displacement * Cos Ø Where Cos Ø is the angle of the two vectors Force and Displacement are both vectors but when multiplied by each other they form a scalar, work. However, Work can be negative. Work is called a Scalar Product because it is the product of two vectors, but shows no direction itself. Work's units are N*m and are called Joules after discoverer James Joule. Work is very closely related to Impulse. However, you can impart an impulse on an object and do no work, but if work is done then impulse must occur.

Power: Power is found by taking Work and dividing it by time. Power's unit is Joules/s and are called Watts This means a faster time causes more power and a slower time cause less power.