physics

Review 

1 Balancing Moments

-seesaw: sube y baja 4

-Perpendicular: At a 90 degree angle to someting 

-Newton: Te unit of measurement of force

-Clockwise-In te same direction as temovement of te ands on a clock 

-Counterclockwise: in te opposite direction to te movement of te ands on a clock

Diagram 

a-You ave to calculate te moment 

b-Te weel turns more easily wen you spin it from near te rim. Te distance 

M=fd                                              F=30N       M=fd  

Left is 2FI  same result                    d=15cm     M=(30) (0.15)=4.5  

Rigt is 2dF same result                  0.15m        M=4.5Nm

2 Making a scale 

-Spring constant: A measure of ow stiff or strong a spring is 

-Extension: Te increase in te longt of someting

-Elastic: A material able to resume its original sape after being stretxed or compressed 

-Elastic Limit: Te extent to wix an object can be stretxed witout permanently alterning its sape or size

Diagram 

a- It refers on ow stiff or strong a spring is 

b- Its stiff because a spring wit a ig spring constant requires more force to extend