Forces and their Effects Flashcards

1
Q

What is an alternative name for the turning effect of a force?

A

A moment

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2
Q

What is the equation used to calculate the moment of a force?

A

Moment of force = force x distance

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3
Q

What distance measurement is used when calculating a moment?

A

The perpendicular distance from the pivot to the line of action of the force

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4
Q

If an object is in equilibrium, what can be said about the moments acting on the object?

A

The clockwise moments are equal to the anti-clockwise moments

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5
Q

How do levers make use of moments?

A

They increase the perpendicular distance of the force from the pivot, so decrease the force needed to produce the same moment

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6
Q

How are levers used to decrease the force required to lift something?

A

Levers use a pivot point and the concept of moments to reduce the force, the further you are away from the pivot point, the less force you need to lift the object up

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7
Q

How does lubricating levers/gears improve efficiency?

A

There is less resistance, less energy is wasted overcoming frictional forces

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8
Q

What is a force?

A

A push or pull acting on an object due to an interaction with another object

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9
Q

What are the two categories that all forces can be split into?

A

Contact and non-contact forces

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10
Q

What are some examples of contact forces?

A

Friction, air-resistance and tension

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11
Q

What are some examples of non-contact forces?

A

Gravitational, electrostatic and magnetic forces

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