P2.2.1 - Forces and interactions Flashcards

1
Q

What is Newton’s Third Law?

A

‘’When 2 bodies interact, they exert a force upon each other that is equal in size, but opposite in direction’’

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2
Q

What is the unit for force?

A

Newtons (N)

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3
Q

What is a force?

A

A push or pull that acts on an object due to the interaction with another object

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4
Q

What are non-contact forces?

A

A force produced because an object is in a field

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5
Q

What are contact forces?

A

A force that only acts when objects are in contact

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6
Q

What are some examples of non-contact forces?

A
  • Magnetism
  • Gravity
  • Electrostatics
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7
Q

What are some examples of contact forces?

A
  • Friction
  • Drag
  • Upthrust
  • Tension
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8
Q

Is weight directly or inversely proportional to the mass of an object?

A

Directly

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9
Q

What is friction?

A

Friction is the resistance to motion of one object moving relative to another

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10
Q

What is drag?

A

A force that acts opposite to the direction of motion of a body

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11
Q

What is upthrust?

A

The force on an object in a fluid due to the difference in pressure if the fluid acting on the area of the object

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12
Q

What is tension?

A

When solid bevy’s deform slightly when you exert a force on them

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13
Q

State in one way in which the force of gravity is different to the electrostatic force?

A

The force of gravity is only attractive but electrostatic forces can be either attractive or repulsive

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14
Q

Explain why the force of water resistance is greater than the force of air resistance?

A

Water is denser than air as it has more particles than air, so more polar tickles collide and interact exerting a greater force of resistance

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