Rolling objects down a ramp Physics LAB

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Objects Down a Ramp

(Physics 3U Summative)

Friday December 23rd, 2011

Physics 3U                                                                               Mr. Meldrum

Objective: The purpose of this experiment is to analyze the forces, dynamics and energy of certain objects.

Apparatus:                Wooden ramp                Pencil Case

                        Newton scale                Wooden block

                        Digital scale                Sandpaper (60 gritt)

                        Timer                        Meter tape

                        Tape holder

Method:

Measure the ramp

Let go of objects from specified length (90, 75, 50 inches)

Time the time it takes from letting go to hitting the wall (repeat 5 -8 times)

Repeat until all 3 objects have been timed at all 3 distances

Observations:

Calculations

Pencil Case

Pencil case: 400.1g

Static friction 1.5 N

Kinetic friction: 1.2 N

60 inches:  

         = 0.73 s

75 inches:  

                 = 0.93 s

90 inches:

                 = 1.10 s

Tape Holder

Tape holder: 611.7g

Static friction: 3.75 N

Kinetic friction 3.5 N

60 inches:  

                = 1.63 s

75 inches:  

                 = 1.87 s

90 inches:  

         = 2.24 s

Wooden Block (with Sandpaper at the bottom)

Wooden block: 293.9g

Static friction: 2.3 N

Kinetic friction 2.3 N

60 inches:  

         = 1.37 s

75 inches:  

                 = 1.67 s

90 inches:  

 = 1.76 s

Pencil Case

It took approximately 0.93 seconds to travel 75 inches.

                                                        

                                                         

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 (205 cm/s)                                a= 0.22

 (

)

Therefore velocity is 0.205 m/s and acceleration is 0.220

400.1 g = 3.22 N (weight)

                                        

                                             

                                        

Therefore force of static friction is approximately 4.83 N and the force of friction is approximately 3.864 N

                                          

 (9.8) (1.52)                        

          

 

 (9.8) (0.5)        

 

 J

5.958-1.96 = 3.998

3.998 J - 3.8 J ...

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