Speed, Velocity, and Acceleration Problem Solving

The video tutorial covers solving speed, velocity, and acceleration problems using a triangle method. The instructor solves odd-numbered problems, demonstrating calculations for speed, velocity, and acceleration in various scenarios, including a car, train, and roller coaster. The video emphasizes understanding the relationship between distance, time, and speed, and introduces the concept of acceleration as a change in velocity over time.

What is the formula for calculating speed?

• Speed = Distance x Time

• Speed = Distance / Time

• Speed = Time / Distance

• Speed = Distance + Time

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If a train travels 120 kilometers in 2.5 hours, what is its average speed?

• 48 km/h

• 50 km/h

• 40 km/h

• 45 km/h

George walks 750 meters north and then 250 meters south in 13 seconds. What is his speed?

• 76.9 m/s

• 70.0 m/s

• 80.0 m/s

• 85.0 m/s

What is the difference between speed and velocity?

• Neither are vectors

• Both are vectors

• Velocity is a vector, speed is not

• Speed is a vector, velocity is not

A roller coaster's velocity changes from 10 m/s to 26 m/s in 2 seconds. What is its acceleration?

• 10 m/s²

• 16 m/s²

• 8 m/s²

• 12 m/s²

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A car traveling at 15 m/s comes to a stop in 10 seconds. What is its acceleration?

• -1.2 m/s²

• -2.0 m/s²

• -1.0 m/s²

• -1.5 m/s²

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What is the acceleration due to gravity on Earth?

• 9.8 m/s

• 9.8 m/s²

• 10 m/s²

• 8.9 m/s²

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If a train going 60 m/s takes 85 seconds to stop, what is its acceleration?

• -0.60 m/s²

• -0.90 m/s²

• -0.71 m/s²

• -0.80 m/s²

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How long will it take a car to accelerate from 15.2 m/s to 23.5 m/s with an acceleration of 3.2 m/s²?

• 3.0 seconds

• 2.5 seconds

• 0.48 seconds

• 1.5 seconds

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What does the Greek letter delta (Δ) represent in physics equations?

• Product

• Sum

• Difference

• Change

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