Mechanical Advantage of Pulleys
RYERSON UNIVERSITY
DEPARTMENT OF PHYSICS
LAB REPORT
TITLE OF EXPERIMENT
Mechanical Advantage of Pulleys
AUTHORS OF THIS REPORT:
SHAHIN ESMAEILIAZAD 500164540
LEILA FEIAMOHAMMADI 500115287
FOR
PCS 211---SECTION 07
EXPERIMENT PERFORMED ON (DATE): October3/ 2006
REPORT SUBMITTED ON (DATE): October 10/ 2006
TA’S NAME: Mr. SALAH SHARIF
OBJECTIVE AND BACKGROUND[pic]
This experience was performed to study different pulley arrangement and determine their advantage and efficiency. Pulley which is considered as a type of machine helps individual by changing the magnitude or direction of the force. In general, machines make the out put force or torque greater than input one. The magnitude of the force multiplication is called Mechanical Advantage. Here, two Mechanical Advantages and their differences will be discussed. One of them is Theoretical Mechanical Advantage and the other one is Actual Mechanical Advantage. Theoretical Mechanical Advantage, TMA, is defined as the ratio of the output force by the input (ideal) force.
[pic]
In contrast, Actual Mechanical Advantage, AMA, deal with the real situation which factional force and pulley’s weight will occur and the output force is always smaller than what expected.
[pic]
As far as work is concerned, in ideal case, input force work equals to output work:
[pic]
However, in real case the addition of the lost energy and output is equal to input force:
[pic]
The usage of machines is quite common and individual often check the efficiency of the machines or motors for better result. Efficiency can be defined as [pic], in terms of work, energy or power. The formula is as fallow:
[pic]
PROCEDURE AND OBSERVATION
EXPERIMENT I
MATERIAL: pulley, weight, holder, measured weight, rope [pic]
PROCEDURE: A pulley system as figure (1) was set and then it checked if it was working properly. Different weights added to the holder for tree times as Load, and measured
DEPARTMENT OF PHYSICS
LAB REPORT
TITLE OF EXPERIMENT
Mechanical Advantage of Pulleys
AUTHORS OF THIS REPORT:
SHAHIN ESMAEILIAZAD 500164540
LEILA FEIAMOHAMMADI 500115287
FOR
PCS 211---SECTION 07
EXPERIMENT PERFORMED ON (DATE): October3/ 2006
REPORT SUBMITTED ON (DATE): October 10/ 2006
TA’S NAME: Mr. SALAH SHARIF
OBJECTIVE AND BACKGROUND[pic]
This experience was performed to study different pulley arrangement and determine their advantage and efficiency. Pulley which is considered as a type of machine helps individual by changing the magnitude or direction of the force. In general, machines make the out put force or torque greater than input one. The magnitude of the force multiplication is called Mechanical Advantage. Here, two Mechanical Advantages and their differences will be discussed. One of them is Theoretical Mechanical Advantage and the other one is Actual Mechanical Advantage. Theoretical Mechanical Advantage, TMA, is defined as the ratio of the output force by the input (ideal) force.
[pic]
In contrast, Actual Mechanical Advantage, AMA, deal with the real situation which factional force and pulley’s weight will occur and the output force is always smaller than what expected.
[pic]
As far as work is concerned, in ideal case, input force work equals to output work:
[pic]
However, in real case the addition of the lost energy and output is equal to input force:
[pic]
The usage of machines is quite common and individual often check the efficiency of the machines or motors for better result. Efficiency can be defined as [pic], in terms of work, energy or power. The formula is as fallow:
[pic]
PROCEDURE AND OBSERVATION
EXPERIMENT I
MATERIAL: pulley, weight, holder, measured weight, rope [pic]
PROCEDURE: A pulley system as figure (1) was set and then it checked if it was working properly. Different weights added to the holder for tree times as Load, and measured