1. What is Final Velocity?

Final velocity is the velocity of an object at the end of a particular time interval. It is calculated using the relationship between momentum and mass, where velocity equals momentum divided by mass.

2. How Does the Calculator Work?

The calculator uses the final velocity formula:

Where:

• \( v_f \) — Final velocity (m/s)
• \( p_f \) — Final momentum (kg m/s)
• \( m \) — Mass (kg)

Explanation: This formula demonstrates the direct relationship between momentum and velocity, where velocity is proportional to momentum when mass is constant.

3. Importance of Final Velocity Calculation

Details: Calculating final velocity is essential in physics for understanding motion dynamics, predicting object trajectories, and analyzing collisions and impacts in various engineering applications.

4. Using the Calculator

Tips: Enter final momentum in kg m/s and mass in kg. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between velocity and speed?
A: Velocity is a vector quantity that includes both magnitude and direction, while speed is a scalar quantity that only includes magnitude.

Q2: Can final velocity be negative?
A: Yes, final velocity can be negative when the object is moving in the opposite direction of the defined positive direction.

Q3: How does mass affect final velocity?
A: For a given momentum, a larger mass results in a smaller final velocity, and vice versa, according to the inverse relationship in the formula.

Q4: What units should I use for accurate results?
A: Use consistent SI units: momentum in kg·m/s and mass in kg to get velocity in m/s.

Q5: Can this formula be used for relativistic speeds?
A: No, this classical mechanics formula is not accurate at relativistic speeds接近光速. For high velocities, relativistic equations must be used.