An object moves 100 m in 10 s. What is the velocity of the object over this time?

A
10 m/s

B
90 m/s

C
110 m/s

D
1,000 m/s

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Question

A cyclist travels 18 kilometers in 30 minutes. What is their average velocity in meters per second (m/s)?

Answer

10 m/s. First, convert units: 18 km = 18,000 m; 30 min = 1800 s. Then, average velocity = displacement / time = 18,000 m / 1800 s = 10 m/s.

Question

A car travels 60 km north in 1 hour, then turns around and travels 40 km south in the next hour. What is the car's average velocity for the entire two-hour trip?

Answer

10 km/h north. Net displacement = 60 km north - 40 km south = 20 km north. Total time = 2 h. Average velocity = displacement / time = 20 km north / 2 h = 10 km/h north.

Question

A runner completes one lap on a 400-meter circular track in 80 seconds, finishing at the starting point. What is the runner's average speed and average velocity for the lap?

Answer

Average Speed: 5 m/s (400 m / 80 s). Average Velocity: 0 m/s. Because the start and finish points are identical, the displacement is zero.

Question

On a distance-time graph, a straight line slopes upward. What does the slope of this line represent, and what can you conclude about the object's motion?

Answer

The slope represents the object's velocity. A straight line means the slope is constant, so the object is moving with a constant velocity.

Question

An airplane flies 800 miles east with a tailwind, taking 2 hours. It then flies 800 miles west against a headwind, taking 2.5 hours. What is the airplane's average speed for the total journey?

Answer

~355.6 mph (or 1600 mi / 4.5 hr). Average speed is total distance / total time. Total distance = 800 mi + 800 mi = 1600 mi. Total time = 2 hr + 2.5 hr = 4.5 hr. 1600 mi / 4.5 hr ≈ 355.6 mph.

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If an object returns to its starting point, is its average velocity for the trip necessarily zero?

An object moves 100 m in 10 s. What is the velocity of the object over this time?

A
10 m/s

B
90 m/s

C
110 m/s

D
1,000 m/s

The velocity of the object is 10 m/s.

Topic Flashcards

Mini Quiz

Related Questions

An object moves 100 m in 10 s. What is the velocity of the object over this time?

A 10 m/s B 90 m/s C 110 m/s D 1,000 m/s

The velocity of the object is 10 m/s.

Topic Flashcards

Mini Quiz

Related Questions

A
10 m/s

B
90 m/s

C
110 m/s

D
1,000 m/s