大物实验报告范文

大物实验报告范文
Title: Determination of the Coefficient of Friction between a Wooden Block and a Rough Surface
Abstract:
The purpose of this experiment was to determine the coefficient of friction between a wooden block and a rough surface. This was achieved by measuring the force required to move the wooden block across the surface at various angles. The wooden block was placed on the inclined surface and a weight was gradually added until the wooden block began to move. The force required to move the block was then measured using a force sensor. The measurements were repeated for different angles of inclination. The coefficient of friction was calculated using the equation Coefficient of Friction = Force of Friction / Normal Force. The experiment yielded a coefficient of friction of 0.35 between the wooden block and the rough surface. This value is within the expected range for a wooden block and a rough surface.
Introduction:
Friction is a force that opposes motion between two surfaces in contact. It plays a significant role in our daily lives, affecting everything from walking to driving. The coefficient of friction is a dimensionless quantity that represents the ratio
of the force of friction between two surfaces to the normal force pressing them together. Determining the coefficient of friction between two surfaces is important in various fields, such as engineering, physics, and materials science.
In this experiment, we aimed to determine the coefficient of friction between a wooden block and a rough surface. The wooden block was placed on an inclined surface, and a weight was gradually added until the wooden block began to move. The force required to move the block was then measured using a force sensor. By repeating these measurements for different angles of inclination, we could calculate the coefficient of friction.
Materials and Methods:
1. Wooden block: The block was made of solid wood with dimensions of 10 cm x 5 cm x 2 cm.
2. Rough surface: The rough surface was created by attaching sandpaper to a flat board.
3. Force sensor: The force sensor was calibrated before use.
4. Weight hanger and weights: Various weights were used to gradually increase the force on the wooden block.
5. Protractor: To measure the angle of inclination of the rough surface.
Procedure:
1. Set up the inclined surface by placing the rough surface board at an angle.
2. Place the wooden block on the rough surface and adjust the angle of inclination until the block remains stationary.
3. Attach the force sensor to the wooden block and zero the reading.
4. Add a weight to the hanger and carefully hang it from the force sensor.
5. Gradually increase the weight until the wooden block just begins to move.
6. Record the mass of the weight hanger and weights as the force required to move the block.
7. Repeat steps 4-6 for different angles of inclination.
8. Calculate the coefficient of friction using the equation: Coefficient of Friction = Force of Friction / Normal Force.
Results and Discussion:
Table 1: Force Required to Move the Wooden Block at
Different Angles of Inclination
Angle of Inclination (°) Force of Friction (N)
302.5
453.5
604.5
755.4
906.0
The calculated coefficient of friction of 0.35 between the wooden block and the rough surface is within the expected range for a wooden block and a rough surface. The rough surface created by the sandpaper increased the frictional force, resulting in a higher coefficient of friction. The results obtained from this experiment align with the theoretical expectations and demonstrate the accuracy of the experimental setup.
Conclusion:
In conclusion, this experiment successfully determined the coefficient of friction between a wooden block and a rough surface. The coefficient of friction was found to be 0.35, which falls within the expected range for a wooden block and a rough surface. This experiment highlights the importance of understanding the behavior of friction between different surfaces and provides valuable insights for various applications in engineering and materials science.。