Forces Flashcards

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1
Q

A Force

A
  • A push, pull or twist
  • Measured in Newtons (N)
  • Causes changes in shape, direction or movement
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2
Q

Contact force

A

a force that acts only between objects that are touching.
Examples:
Friction

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3
Q

Non-contact force

A

A force that acts between objects even though the objects aren’t touching
Examples: magnetic, gravity, electrostatic

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4
Q

Gravity

A
  • A pull
  • It affects everything on Earth
  • Weight= mass x gravity
  • holds planets in orbit
  • The larger something is, the more gravitational pull
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5
Q

Friction

A
  • Friction is the force we feel when two surfaces rub together
  • We can increase the friction between surfaces by increasing the roughness
  • The harder things are rubbing together, the more friction there is
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6
Q

Mass

A

Is a measure of the amount of material in an object of substance.

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7
Q

Weight

A

Weight of an object or substance is a measure of the force of gravity pulling it towards the centre of a large object (planet, moon, star)

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8
Q

Air resistance

A

Is a type of friction that occurs whenever an object moves through the air, and is caused by the frictional forces acting between the air and the object.

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