Speed, Displacement, Velocity, and Acceleration (Junior Cert Science): Quizzes

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Speed, Displacement, Velocity, and Acceleration
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What is the formula for calculating speed?

speed=distancetime\text{speed} = \frac{\text{distance}}{\text{time}}

What is displacement?

Distance travelled in a given direction

What is the key difference between speed and velocity?

Velocity includes direction, speed does not

On a distance-time graph, what does the slope represent?

Speed

What does a horizontal line on a distance-time graph indicate?

The object is stationary (zero speed)

What are the units of acceleration?

m s−2\text{m s}^{-2}

On a velocity-time graph, what does the slope represent?

Acceleration

What does a horizontal line on a velocity-time graph mean?

Constant velocity (zero acceleration)

What is the acceleration due to gravity on Earth?

Approximately 10 m s−210 \text{ m s}^{-2}

In a vacuum, how do a feather and a coin fall?

At the same rate

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