P9 - Motion (PAPER 2) Flashcards

1
Q

What is the formula for speed

A

Speed (m/s) = distance (m) / time (s)

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2
Q

What does the gradient of a line on a distance - time graph represent

A

The speed

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3
Q

What is the difference between speed and velocity

A

Speed - only has magnitude

Velocity - speed with a direction

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4
Q

What is the formula for acceleration

A

Acceleration (m/s^2) = change in velocity (m/s) / time for change (s)

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5
Q

What is the difference between acceleration and deceleration

A

Acceleration - change of velocity per second when an object speeds up
Deceleration - change of velocity per second when an object slows down

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6
Q

What device can be used to measure velocity change

A

Motion sensors linked to computers

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7
Q

What does a horizontal line on a distance-time graph show

A

the object is stationary

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8
Q

What do positive and negative gradients on a velocity-time graph show

A

Positive - acceleration

Negative - deceleration

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