Work Formula:
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Definition: This equation calculates the work done when a force acts on an object over a distance at an angle.
Purpose: It helps physicists, engineers, and students understand and quantify mechanical work in various systems.
The equation uses the formula:
Where:
Explanation: Only the component of force in the direction of displacement does work. The cosine term accounts for the angle between force and displacement.
Details: Work calculations are fundamental in mechanics, energy transfer analysis, and designing mechanical systems.
Tips: Enter the force in Newtons, distance in meters, and angle in degrees (0° for parallel, 90° for perpendicular). All values must be ≥ 0.
Q1: What happens when θ = 0°?
A: At 0°, cos(θ) = 1, meaning all force contributes to work (maximum work done).
Q2: What happens when θ = 90°?
A: At 90°, cos(θ) = 0, meaning no work is done as force is perpendicular to displacement.
Q3: Can work be negative?
A: Yes, when 90° < θ ≤ 180°, cos(θ) is negative, indicating force opposes motion.
Q4: What are typical force values?
A: 1 N ≈ weight of an apple, human pushing force typically 50-500 N, car engine force thousands of N.
Q5: How does this relate to energy?
A: Work equals energy transferred. 1 Joule = 1 Newton-meter of energy transferred.