Thurs (21 Oct):

 

 

 

Key Concept(s) Today: PE to KE

 

Lab Day

 

 

L #12: 1- 14,  16, 17    Due Fri 22 Oct (Work & Power)

 

L #13: 1- 13,  18, 19    Due Mon 25 Oct (Instantaneous Vel & Acc)

 

L #16: 1- 9,  11-15, 17    Due Monday 1Nov (Simple Machines)

 

L #17: 1- 16    Due Wed 3Nov (Sliding Blocks)

 

 

 

Test 9, 12, 13, 15, 16, 17  Monday 8 Nov 

 

 

 

 

 

 

 

 

 

                 H1

 

 

 

 

 

 

                                                  H2

 

 

                                                                                                        x

 

 

 

 

Lab –

Lab: Potential Energy à Kinetic Energy

 

Question: How far will an object travel given (Horizontally) given a certain amount of Potential Energy?

 

Background:        Using the PE of a given height (minimum of .20m) of a Pendulum, determine the horizontal distance a bob will travel when cut. (ONLY ONE CHANCE)

                                                                                                                          

Hypothesis: If the height of the bob (pendulum) is _H1__m above the bottom of the arc and the height of the bob when cut is __H2__ m above the floor, then the bob will travel __x__ m horizontal when cut (at the bottom of the arc) because horizontal distance depends only on horizontal speed and time in the air. Horizontal speed can be calculated from height and time can be calculated by how long it takes to drop H2 m.

 

Materials: ring stand, thread, bob and razor blade.

 

 

Procedures (Yours: 4-7 numbered steps):

            1.

            2.

            …

            …

 

Data:                         

           

H1

Height above arc (m)

(Using

PE =KE)

Horiz. Vel.

H1

Height above ground when cut (M)

Time to hit ground (s)

Horizontal Dist (x) traveled

 

 

 

 

 

 

 

EC:    If you can land within 2.0 cm of your predicted target. (ONLY ONE CHANCE)

 

 

Conclusion:  (Make sure to include   % error)