• Calculate and record the weight values in Newtons in the table below. This will be the force exerted at that particular position on the meter stick, due to the mass that is present there. • Calculate and record the lever arm values in meters in the table below. Lever arm is the positive distance from the pivot, calculated as the difference between recorded position values. ● ● Calculate and record the torque values in Nm in the table below. First calculate the weight force exerted at that point, and then multiply by the lever arm. (Angles are 90° for these trials.) Further calculations and analysis will be performed in the Data Analysis section that follows. torque (Nm) right side (all trials) left side (trial 1) left side (trial 2) left side (trial 3) mass 20.90 g + 50 g = kg 20.74 g + 100 g = kg 20.74 g + 50 g = kg 20.74 g +30 g = kg weight (N) position 75.00 cm 35.65 cm 25.30 cm 15.55 cm lever arm (m) 75.00-50.20 cm = m 50.20-35.65 cm = m 50.20-25.30 cm = m 50.20-15.55 cm = m

• Calculate and record the weight values in Newtons in the table below. This will be the force exerted at that particular position on the meter stick, due to the mass that is present there. • Calculate and record the lever arm values in meters in the table below. Lever arm is the positive distance from the pivot, calculated as the difference between recorded position values. ● ● Calculate and record the torque values in Nm in the table below. First calculate the weight force exerted at that point, and then multiply by the lever arm. (Angles are 90° for these trials.) Further calculations and analysis will be performed in the Data Analysis section that follows. torque (Nm) right side (all trials) left side (trial 1) left side (trial 2) left side (trial 3) mass 20.90 g + 50 g = kg 20.74 g + 100 g = kg 20.74 g + 50 g = kg 20.74 g +30 g = kg weight (N) position 75.00 cm 35.65 cm 25.30 cm 15.55 cm lever arm (m) 75.00-50.20 cm = m 50.20-35.65 cm = m 50.20-25.30 cm = m 50.20-15.55 cm = m

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter9: Statics And Torque

Section: Chapter Questions

Problem 29PE: A device for exercising the upper leg muscle is shown in Figure 9.39, together with a schematic...

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

### Instructions for Calculating Weight, Lever Arm, and Torque

1. **Calculate and record the weight values in Newtons in the table below.** This will be the force exerted at that particular position on the meter stick, due to the mass that is present there.

2. **Calculate and record the lever arm values in meters in the table below.** Lever arm is the positive distance from the pivot, calculated as the difference between recorded position values.

3. **Calculate and record the torque values in Nm in the table below.** First calculate the weight force exerted at that point, and then multiply by the lever arm. (Angles are 90° for these trials.)

> Further calculations and analysis will be performed in the Data Analysis section that follows.

### Experimental Data Table

| | **mass** | **weight (N)** | **position** | **lever arm (m)** | **torque (Nm)** |
|--------------------|-----------------------------|----------------|--------------|---------------------------------|-----------------|
| **right side** <br> (all trials) | 20.90 g + 50 g = | | 75.00 cm | 75.00 - 50.20 cm = | |
| **left side** <br> (trial 1) | 20.74 g + 100 g = | | 35.65 cm | 50.20 - 35.65 cm = | |
| **left side** <br> (trial 2) | 20.74 g + 50 g = | | 25.30 cm | 50.20 - 25.30 cm = | |
| **left side** <br> (trial 3) | 20.74 g + 30 g = | | 15.55 cm | 50.20 - 15.55 cm = | |

- **Mass (g)**: The mass on each side includes an initial mass of 20.74 g to 20.90 g with additional weights added.
- **Position (cm)**: The position on the meter stick where the mass is placed.
- **Lever Arm (m)**: The calculated difference between the recorded position in meters and a fixed pivot point (50.20 cm).
- **Torque (Nm)**: Torque is

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