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Physics > Random Forces > Flashcards

Random Forces Flashcards

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1
Q

What is an equilibrium?

A

When an object is at rest, is moving at a steady pace or has a resultant force of 0N

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2
Q

When is an object elastic?

A

When it returns to its original length after being stretched.

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3
Q

What is another name for upthrust

A

Buoyancy

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4
Q

What does the force of friction do?

A

Opposes motion

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5
Q

How can friction be reduced

A

Through lubrication and streamlining

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6
Q

What are free-body diagrams used for?

A

Free-body diagrams are diagrams used to show the size and direction of all forces acting upon an object in a situation.

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7
Q

What does the length of the arrow in a free body diagram represent?

A

The magnitude

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8
Q

What is the scientific meaning of a fluid?

A

a fluid is a substance that continually deforms (flows) under an applied shear stress

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9
Q

What is motion?

A

The change in position

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10
Q

What is speed?

A

The rate at which an object covers distance

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11
Q

What is acceleration

A

the rate at which speed changes.

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12
Q

What is deceleration

A

Negative acceleration

Remove the zero

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13
Q

What does the slope of a distance time graph graph tell you?

A

In a distance-time graph, the slope or gradient of the line is equal to the speed of the object

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14
Q

What does the gradient of a speed time graph represent

A

The gradient of speed-time and velocity-time graphs represent acceleration

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15
Q

What does the area under a speed time graph represent?

A

The area under a speed-time graph represents the distance travelled

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16
Q

What is terminal velocity

A

the constant speed that a freely falling object eventually reaches when all the forces acting on it are balanced

17
Q

How can an electromagnet be made stronger?

A

▶ Increasing the number of turns in the solenoid
▶ Increasing the current strength flowing through the solenoid
▶ By placing a soft iron core inside the solenoid
- soft means that it is easily magnetised

18
Q

What do waves do?

A

Transfer energy from one point to another.

19
Q

What is the high peak of a wave called

A

Peak

20
Q

What is the low peak of a wave called

A

Trough

21
Q

Is the following a transverse or longitudinal wave?

A

Light reaching your eye

22
Q

What is the line of propagation

A

The central line through which the wave goes

23
Q

What is a wave length

A

A repeated point on the wave

24
Q

What is the line from the line of propagation to they peak/trough called?

A

Amplitude

25
Q

Where can light-eye wave travel

A

In a vacuum

26
Q

What is the scientific method?

A

A way to ask and answer scientific questions.

27
Q

What are the steps of the scientific method

A 
Problem
Hypothesis 
Experiment
Data
Conclusion
Publish
28
Q

What is velocity

A

the speed of something in a given direction

Physics (7 decks)

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