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Physics Paper 2 > Forces > Flashcards

Forces Flashcards

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1
Q

What is a scalar quantity?

A

Only has a size (magnitude)

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2
Q

What is a vector quantity?

A

Has both a size and direction

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3
Q

What is a force?

A

A push or pull that acts on an object due to the interaction with another object

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4
Q

Is force a vector or scalar quantity?

A

Vector

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5
Q

Define contact force

A

Interaction between objects

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6
Q

Define non-contact force

A

When objects are physically separated

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7
Q

What is the same about the interaction pair of forces when two objects interact with each other?

A

Forces are the same size

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8
Q

What is different about the interaction pair of forces when two objects interact with each other?

A

Forces in opposite directions

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9
Q

Resultant force on an object if forces are balanced

A

Zero

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10
Q

Force acting on an object due to gravity

A

Weight

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11
Q

Instrument used to measure weight of an object

A

Newtonmetre

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12
Q

Define centre of mass

A

Point at which the weight of the object is considered to act

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13
Q

Define elastic deformation

A

When an object can return back to its orginal shape and size after force causing deformation is removed

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14
Q

Define inelastic deformation

A

When an object does not return back to its orginal shape and size after forces causing deformation have been removed

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15
Q

How do you find the spring constant from a force-extension graph of a spring?

A

Find the gradient of the straight line section

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16
Q

What is the turning effect of a force called?

A

A moment

17
Q

What can you say about clockwise and anticlockwise moments on a balanced object?

A

Sum of all the clockwise moments about any point = sum of all the anticlockwise moments about that point

18
Q

How does a lever reduce the amount of force needed to create a particular sized moment?

A

By increasing the distance from the pivot

19
Q

What happens to the moment of a force when a small gear drives a large gear?

A

Moment is increased

Physics Paper 2 (13 decks)

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