Forces Flashcards

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1
Q

Define force and what can a force do

A
  • Push or pull

- Change speed, direction or shape of an object

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2
Q

What can be used to measure a force

A

Spring balance

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3
Q

5 examples of force

A
  • Weight
  • Normal contact force
  • Tension
  • Compression
  • Friction
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4
Q

Weight

A

Pull exerted by the earth on a mass

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5
Q

Normal contact force

A
  • Push exerted by surface to support masses resting on it

- Its direction is perpendicular to the surface of contact

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6
Q

Compression

A

Push exerted on an object to ‘squeeze’ it

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7
Q

Friction

A

Push or pull to oppose motion

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8
Q

2 terms to call an object when its net movement is 0

A
  • Balanced

- in equilibrium

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9
Q

What makes an object at equilibrium

A
  • Constant speed

- Not moving/ at rest

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10
Q

What causes friction

A

The irregularities in the surfaced in mutual contact.

- Not dependent on surface area of contact

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11
Q

Formula to calculate weight

A

W = m x g

[weight = mass x gravitational force]

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12
Q

Define centre of gravity

A

A point where the weight of an object seems to act

geometric centre of the object

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13
Q

How to improve the stability of an object

A
  • Lower centre of gravity

- wider base area/ larger base (in contact with the ground)

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