Topic 5 Moments Flashcards

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1
Q

What is a moment

A

The turning affect of a force

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2
Q

What does a larger force or a long distance spanner mean

A

A large moment

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3
Q

What needs to be done to get a maximum moment for a spanner

A

Push at right angles perpendicular to the spanner
Pushing at any other angle means a smaller distance so smaller moment

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4
Q

What happens if the total anticlockwise moment equals the clockwise moment about a pivot

A

The object is balance and won’t turn

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5
Q

What are gears

A

Circular discs with teeth

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6
Q

What do teeth do on a gear

A

Interlock so that turning one causes another to turn in the opposite direction

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7
Q

What are gears used for

A

Transmit the rotational effect of a force from one place to another

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8
Q

What does a large Gear do

A

Gives a bigger moment because the distance to the pivot is greater

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9
Q

With a larger gear spin faster or slower than a small gear

A

Slower

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10
Q

What do levers do

A

Increase the distance from the pivot at which the force is applied and since m =fd less force is needed to get the same moment

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11
Q

What do levers make it easier to do

A

To do work e.g lift a load

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