Determine the torque on a bolt, if you are pulling with a force of 250 N directed perpendicular to a wrench of length 20 cm.

Answer

To determine the torque on a bolt when a force is applied, we can use the formula for torque (τ):

\[ \tau = F \times r \]

Where:
- \( \tau \) is the torque,
- \( F \) is the force applied,
- \( r \) is the distance from the pivot point (in this case, the length of the wrench) at which the force is applied, measured perpendicularly.

### Step-by-Step Solution:

1. **Identify the Given Values:**
- Force \( F = 250 \, \text{N} \)
- Length of the wrench \( r = 20 \, \text{cm} \)

2. **Convert the Length to Meters:**
- Since the SI unit for length is meters, we need to convert 20 cm to meters.
\[ r = 20 \, \text{cm} = \frac{20}{100} \, \text{m} = 0.2 \, \text{m} \]

3. **Apply the Torque Formula:**
- Now, substitute the values into the torque formula:
\[ \tau = F \times r = 250 \, \text{N} \times 0.2 \, \text{m} \]

4. **Calculate the Torque:**
- Perform the multiplication:
\[ \tau = 250 \times 0.2 = 50 \, \text{N m} \]

5. **State the Final Answer:**
- The torque on the bolt is \( 50 \, \text{N m} \).

### Final Answer:
The torque on the bolt is \( 50 \, \text{N m} \).

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