Lab: Coefficient of Friction, Static Friction, and Kinetic Friction
Introduction
The purpose of this lab is to determine:
the coefficient of friction between a rubber stopper and a wooden ramp
the coefficient of static friction between a wooden block and a wooden ramp
the coefficient of kinetic friction between a wooden block and a wooden ramp
The design of this experiment was done by placing a rubber stopper / wooden block onto a wooden ramp and tilting the ramp at a certain degree to cause the stopper / block to move. The measurements of the vertical distance and length of the wooden ramp would be needed in order to calculate the static coefficient of the two objects. However, too find the kinetic coefficient of the two objects, the distance that the wooden block travelled and the time it took to travel that certain distance would also be required. The independent variable is time and the dependant variable is ____________________.
Hypothesis:
coefficient of static friction on a rubber stopper and a wooden ramp is greater than the coefficient of static friction on a wooden block and a wooden ramp because rubber will resist more as it goes across a surface than wood
coefficient of static friction on a wooden block and a wooden ramp is greater than the coefficient of kinetic friction on a wooden block and a wooden ramp because it requires more force to get an object moving then to keep it moving at a constant
Diagram
Materials
Metre stick
Stop watch
Tape
Rubber stopper
Wooden block
Wooden ramp
Procedure
Coefficient between a rubber stopper and a wooden ramp:
1. A rubber stopper was placed onto a wooden ramp, the length of the wooden ramp was measured
2. The wooden ramp was then tilted at an angle to cause the rubber stopper to move slightly, the vertical distance was measured
3. 5 trials were done, it was made sure that the rubber stopper was placed on the same side during each trial and at approximately the same location on the ramp
Coefficient of static friction between a wooden block and a wooden ramp
4.
The purpose of this lab is to determine:
the coefficient of friction between a rubber stopper and a wooden ramp
the coefficient of static friction between a wooden block and a wooden ramp
the coefficient of kinetic friction between a wooden block and a wooden ramp
The design of this experiment was done by placing a rubber stopper / wooden block onto a wooden ramp and tilting the ramp at a certain degree to cause the stopper / block to move. The measurements of the vertical distance and length of the wooden ramp would be needed in order to calculate the static coefficient of the two objects. However, too find the kinetic coefficient of the two objects, the distance that the wooden block travelled and the time it took to travel that certain distance would also be required. The independent variable is time and the dependant variable is ____________________.
Hypothesis:
coefficient of static friction on a rubber stopper and a wooden ramp is greater than the coefficient of static friction on a wooden block and a wooden ramp because rubber will resist more as it goes across a surface than wood
coefficient of static friction on a wooden block and a wooden ramp is greater than the coefficient of kinetic friction on a wooden block and a wooden ramp because it requires more force to get an object moving then to keep it moving at a constant
Diagram
Materials
Metre stick
Stop watch
Tape
Rubber stopper
Wooden block
Wooden ramp
Procedure
Coefficient between a rubber stopper and a wooden ramp:
1. A rubber stopper was placed onto a wooden ramp, the length of the wooden ramp was measured
2. The wooden ramp was then tilted at an angle to cause the rubber stopper to move slightly, the vertical distance was measured
3. 5 trials were done, it was made sure that the rubber stopper was placed on the same side during each trial and at approximately the same location on the ramp
Coefficient of static friction between a wooden block and a wooden ramp
4.