FRICTION LAB
Student Name Student #
Rashid 322-485-574
Omer
Manaas
Omar
Teacher: Mr. Fernando
Problem -
* Purpose of Experiment:
This experiment was done to observe the motion of a object on an inclined plane. The purpose of the experiment was to find out a Dt ,Vt and an At graph of a object sliding on an inclined plane and give answers to the questions on the analysis part after observing the graphs.
We were trying to find carts acceleration, velocity. Method - Place equal number of book under an inclined plane. Measure the angle of elevation of the table. Measure the mass of the cart. Connect the CBL, motion detector and the computer. Start the logger pro 2.1 program. (collect for the DT Graph) Place the cart on the top of the desk while the motion detector is placed at the bottom. Click collect to start recording the data and then release the cart. Repeat until satisfied with result.
Analysis:
Velocity - time graph and an acceleration - time graph .
For velocity time graph :
A B C D E F G
TIME (S) 0.2 0.4 1.00 1.5 2.00 3.00 3.4
Velocity (m/s) -.006 -0.042 -0.193 -0.309 -0.429 -0.470 -0.542
For acceleration - time graph
A
a = -0.006 - 0.00
0.2 - 0.0
a = -0.03 m/s�
B
a = -0.042 -(- 0.006)
0.2
a = -0.018 m/s�
C
a = -0.193 -(-0.042)
1.00 - 0.4
a = -0.25 m/s�
D
a = -0.309 -(-0.193)
1.5 - 1.0
a = -0.23 m/s�
E
a = -0.429 -(-0.309)
2.0 - 1.5
a = -0.24 m/s�
F
a = -0.470 -(-0.429)
1.0
a = -0.041 m/s� G a = -0.542 -(-0.470)
0.4
a = -0.18 m/s�
A B C D E F G
TIME (S) 0.2 0.4 1.00 1.5 2.00 3.00 3.4
Acceleration (m/s�) -0.03 -0.018 -0.25 -0.23 -0.24 -0.041 -0.18
7.) As Ff = mFn
\ Ff � mFn
And, Fg = Fn (in this case as the body�s natural force is equal to the force of gravity )
Fg � Fn
As, Fg = m g
Fg � m
\ As mass increases Fg increases and Fn which in this case is directly proportional to Fg increases an as Ff � mFn or Ff � Fn force of friction also increases.
8.) Ff � 1/Fa
And, Fa = Fg sinf
\ Fa � sinf
\ as sinf increases Fa increases and when f increases sinf increases And ,as Ff � 1/Fa
\ As, Fa increases Ff decreases.
\ Force of friction is inversely proportional to the angle of elevation.