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PHYSICS AQA OVERVIEW > Mechanics > Flashcards

Mechanics Flashcards

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1
Q

What is a scalar?

A

Has a magnitude but no direction.

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2
Q

What is an example of a scalar?

A

Mass, Temperature,Time,Speed,Energy

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3
Q

What is a vector?

A

Something with magnitude and direction.

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4
Q

What is the formula for pressure?

A

Force/Area

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5
Q

What is the unit for Pressure?

A

Pa

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6
Q

What is the formula for a moment?

A

Moment of a force=Force*Perpendicular distance

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7
Q

What is the unit for Moment?

A

Nm

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8
Q

What is a couple?

A

When two forces that are equal in size and opposite in direction, we say they form a couple.

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9
Q

What is the formula for a couple?

A

Magnitude of one force*Perpendicular distance

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10
Q

What is the principle of moments?

A

Sum of clockwise moments=Sum of anti clockwise moments for equilibrium

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11
Q

What is the formula for density?

A

Mass/Volume

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12
Q

What is the formula for average speed?

A

Distance traveled/

Time taken

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13
Q

What is the formula for velocity?

A

Displacement/

Time taken

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14
Q

What is the formula for acceleration?

A

Change in velocity/T

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15
Q

What is the area under a velocity time graph?

A

Displacement

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16
Q

Is acceleration a scalar or a vector?

A

Vector

17
Q

What is newtons first law?

A

The velocity of an object will not change unless a resultant force is acted on it

18
Q

What is the formula for momentum?

A

P=mv

19
Q

When is momentum conserved

A

If there is no other external force then momentum is conserved.

PHYSICS AQA OVERVIEW (4 decks)

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