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Physics: Speed, Velocity, and Acceleration

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Physics: Speed, Velocity, and Acceleration

Created by

@TopsPolynomial

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Questions and Answers

What best describes the difference between speed and velocity?

Speed is always constant, while velocity can vary.

Speed is a vector, while velocity is scalar.

Speed can only be measured in kilometers, while velocity can be in any unit.

Speed measures distance over time, while velocity includes a direction. (correct)

How is acceleration defined?

The speed of an object when it is at rest.

The change in speed only when it increases.

The rate at which velocity changes. (correct)

The distance traveled divided by the time taken.

Which of the following units correctly measures speed?

meters

kilograms per meter

miles per hour (correct)

m/s²

If a car travels at 72 mph towards the east, what is referred to as its velocity?

<p>72 mph east</p> Signup and view all the answers

What happens when an object changes direction while maintaining speed?

<p>It is considered to be accelerating.</p> Signup and view all the answers

Study Notes

Speed

Speed is how fast something moves.
It is calculated as distance over time.
Units for speed include m/h, km/h, and m/s.
Instantaneous speed is the speed at a specific moment.
Average speed is the total distance traveled divided by the time it took.

Velocity

Velocity is like speed, but it includes direction.
It is represented as speed with a specific direction.
For example, 72 mph east or 72 mph towards the ocean.

Acceleration

Acceleration is the rate of change of velocity.
It is measured in units of distance per time squared (e.g., m/s2).
Acceleration occurs when velocity changes, whether it's speeding up, slowing down, or changing direction.
Changing direction, even at a constant speed, results in acceleration.

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Description

This quiz will test your understanding of the concepts of speed, velocity, and acceleration. You will learn how to distinguish between these terms and their applications in physics. Get ready to explore how they are calculated and measured in different contexts!