Topic 2 - Forces And Motion - Graphs Flashcards

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1
Q

What does the gradient represent in displacement time graphs?

A

Velocity

A steeper gradient indicates a faster speed.

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2
Q

What does a negative gradient in a displacement time graph indicate?

A

Returning back to the starting point

This indicates that the object is moving in the opposite direction.

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3
Q

What does a horizontal line in a displacement time graph represent?

A

Stationary

The object is not moving.

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4
Q

What does 0 distance mean in a displacement time graph?

A

Back to starting point

The object has returned to its initial position.

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5
Q

What does a curved line in a displacement time graph indicate?

A

Velocity is changing (acceleration)

The slope of the curve varies over time.

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6
Q

What does the gradient represent in velocity time graphs?

A

Acceleration

A steeper gradient means greater acceleration.

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7
Q

What does a negative gradient in a velocity time graph indicate?

A

Deceleration

The object is slowing down.

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8
Q

What does a horizontal line in a velocity time graph indicate?

A

Constant speed

The speed of the object does not change.

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9
Q

What does 0 velocity mean in a velocity time graph?

A

Stationary

The object is not moving.

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10
Q

What does the area under the line in a velocity time graph represent?

A

Distance travelled

This is calculated over the time intervals.

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11
Q

What does a curved line in a velocity time graph indicate?

A

Acceleration is changing

The rate of acceleration varies.

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12
Q

What is average speed used for?

A

When speed changes during motion

It is calculated using overall distances and timings.

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13
Q

Fill in the blank: Average speed is calculated using _______.

A

Overall distances and timings

This provides a general measure of speed over a journey.

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14
Q

What is the formula for calculating constant speed?

A

speed = distance / time

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15
Q

How do you determine average speed?

A

Average speed = total distance / total time

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16
Q

What is the advantage of using light gates to measure speed?

A

It removes reaction time and human error with a stopwatch

17
Q

Fill in the blank: For constant speeds, use _______ to measure time taken.

A

stopwatch

18
Q

What is the speed of sound?

A

340 m/s

19
Q

What is the approximate walking speed in m/s?

A

5 km/h = ~ 1.4 m/s

20
Q

List typical speeds for the following modes of transportation: Running, Cycling, Bus.

A
  • Running: ~6 miles per hour = ~3 m/s
  • Cycling: 15 km/h = ~4 m/s
  • Bus: 14 km/h
21
Q

What is the speed of a train?

A

125 miles/h

22
Q

What is the speed of a plane?

A

900 km/h

23
Q

What is the acceleration due to gravity?

A

9 = 10 m/s²

24
Q

How do you measure speed using light gates?

A

Set up two light gates, measure distance between them, and record time taken to pass from the first to the second

25
Q

Fill in the blank: Typical walking speed is approximately _______ m/s.

A

1.4