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The kinetic energy of an object is given by the formula:

\[
KE = \frac{1}{2} mv^2
\]

where:
- \( KE \) is the kinetic energy,
- \( m \) is the mass of the object, and
- \( v \) is the velocity of the object.

Since the problem states that all three objects (car, roller skate, and bicycle) have the same velocity, the kinetic energy will be proportional to their masses. This means the object with the highest mass will have the highest kinetic energy, and the object with the lowest mass will have the lowest kinetic energy.

**Ranking based on mass:**
1. **Car** (Highest mass)
2. **Bicycle** (Intermediate mass)
3. **Roller skate** (Lowest mass)

Therefore, the ranking of kinetic energy from highest to lowest is:
1. Car
2. Bicycle
3. Roller skate

Would you like more details or have any questions? 

### Related Questions:
1. How does mass affect kinetic energy when velocity is constant?
2. What is the relationship between kinetic energy and velocity if mass is constant?
3. How would the ranking change if velocity was not the same for all objects?
4. What are some real-world scenarios where kinetic energy comparisons are important?
5. How is kinetic energy converted or dissipated in moving vehicles?

**Tip:** Remember that for the same velocity, an object with a higher mass will always have more kinetic energy!

Assume these objects are moving and have the same velocities. Rank them based on the amount of kinetic energy they have, from highest to lowest.

Learn how to rank objects like a car, bicycle, and roller skate based on their kinetic energy when they have the same velocity. Using the kinetic energy formula, this exercise explains why objects with higher mass have more kinetic energy. Suitable for high school students.

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