Friction Experiment
Procedure:
- On the pulley place 50 grams weight on the block which is0.05kg
- Attach the wood block using a string and hanger
- Place the hanger on the other side of the pulley
Use additional weight and put them on the hanger in order toachieve a constant velocity
Data A:
M1 | M2 | N | Fnet | mu |
.17 N | .05 N | 1.7 N | 0.5 | 0.30 |
.22 N | .055 N | 2.2 N | 0.55 | 0.25 |
.27 N | .07 N | 2.7 N | 0.7 | 0.26 |
.32 N | .07 N | 3.2 N | 0.7 | 0.22 |
.37 N | .09 N | 3.7 N | 0.9 | 0.24 |
Procedure:
- Place 50 grams on top of the wood block and 50 grams on thehanger and observe acceleration. Use additional weight ifnecessary
- Record the time for the motion
- Calculate experimental acceleration
- Calculate theoretical acceleration
- Compare using percent error formula
- Repeat one more time
Formulas A:
- M1= Mw+n*50 (n is an integer, start with n=1, go to n=4)
- N=M1 g
- Fnet= M2 g
- Mu= Fnet/N
Data B:
Distance | Time | A(experiment) | MI(N) | M2 | A(theory) | %Difference |
.5 m | .93 s | 1.2 m/s^2 | .12 N | .1 N | 3.18 m/s^2 | 62.3% |
.5 m | .64 s | .61 m/s^2 | .17 N | .1 N | 2.13 m/s^2 | 71.8% |
Formulas B:
- A(experiment)= 2d/t^2
- Average mu= 0.25 --> mu=0.25 for equation below
- A(theory)= (M2 g- mu M1 g)/(M1+M2)
Question: I'm looking for the formulas worked out forboth data tables
ex: plugging in what numbers into what equation to getanswers from both data tables?
