Which pair has the same velocity?

Understand the Problem

The question is asking to identify which pair of entities has the same velocity among the given options. This requires understanding the concept of velocity, which depends on both speed and direction.

Answer

A dog walking west at 3 km/h and a cat walking west at 3 km/h.

Steps to Solve

Understand velocity
Velocity is a vector quantity that requires both speed and direction. Two entities will have the same velocity if they have the same speed and are moving in the same direction.
Analyze the first option
A boy walking east at 2 km/h and a man walking east at 4 km/h.

Different speeds: 2 km/h versus 4 km/h
Conclusion: Not the same velocity.

Analyze the second option
A car standing still and a truck driving in a circle at 4 km/h.

One is stationary (speed = 0), and the other has a speed of 4 km/h.
Conclusion: Not the same velocity.

Analyze the third option
A dog walking west at 3 km/h and a cat walking west at 3 km/h.

Same speed (3 km/h) and same direction (west).
Conclusion: Same velocity.

Analyze the fourth option
A girl walking west at 3 km/h and a boy walking south at 3 km/h.

Same speed (3 km/h) but different directions (west versus south).
Conclusion: Not the same velocity.

The pair that has the same velocity is: A dog walking west at 3 km/h and a cat walking west at 3 km/h.

More Information

Both the dog and the cat have the same speed and direction, which makes their velocities identical. This concept is crucial in physics for understanding motion.

Tips

Confusing speed with velocity; remember that velocity includes direction.
Ignoring one of the two criteria (speed and direction) when comparing entities.

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