MORE NEWTONS LAWS!

        Yesterday we continued to look at Newtons Second Law, "  "An object accelerates in the direction of the force acting upon it." We furthered our learing from looking at simple forces acting upon an object such as ( up, down, forward, back) to more complex forces acting upon an object such as forward35°up. We looked at a few examples as a class, followed by text book questions #1,3, pg. 145.

Example:
                A boy pulls his wagon, a mass of 15kg, giving is a horizonal accelleration of 1.0m/s². If the wagons handle makes and angle at 35° with the ground as he is pulling it, there is a frictional force of 3.0 N opposing to the wagons motions, with that what is the force he is pulling the handle of the wagon?

M=15kg
A= 1.0m/s² ( forward)
Ff=3.0 N ( backward)
Fa= ?

Fnet= mass X Acceleration        (15.0kg){(1.0m/s² ( forward)}= 15 N Forward... + 3 N= 18 N Forward

Cos35 °= 18 N     =          18 N    =  22 N ( Forward35°Up)

                 Fa                   Cos35°

We then continued on with Newtons Third Law, " To every action there is an equal and opposite reaction." We began our new Lab. We started to get the Labquests ready by calibrating the force sensors. We also got our string and mass. Now we can begin our labs today effeciently.