1. What is Work Done by Friction?

Definition: This calculator computes the work done by friction, which is the energy dissipated as heat when an object moves against frictional forces.

Purpose: It helps physicists and engineers understand energy losses in mechanical systems due to friction.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( W \) — Work done by friction (Joules, J)
• \( F_f \) — Frictional force (Newtons, N)
• \( d \) — Distance moved (meters, m)

Explanation: The negative sign indicates that friction always does negative work, removing energy from the system.

3. Importance of Work Done by Friction

Details: Calculating work done by friction helps in designing efficient mechanical systems, calculating energy losses, and understanding braking systems.

4. Using the Calculator

Tips: Enter the frictional force in Newtons and distance in meters. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the work negative?
A: Friction always opposes motion, so it removes energy from the system, hence negative work.

Q2: How do I find the frictional force?
A: Frictional force = μ × N, where μ is the coefficient of friction and N is the normal force.

Q3: Does this include static friction?
A: No, this calculates work done by kinetic friction only (when objects are sliding).

Q4: What if there's no motion?
A: If d = 0, no work is done by friction (static friction does no work).

Q5: Can this be positive?
A: No, work done by friction is always negative as it opposes motion.