FORCES GCSE PHYSICS 2 Flashcards

1
Q

What type of vector is force?

A

vector quantity

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2
Q

What are some examples of vector quantities?

A

force, velocity, displacement, acceleration, momentum

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3
Q

What are vector quantities?

A

have magnitude and direction

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4
Q

What are scaler quantities?

A

only have magnitude and no direction

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5
Q

What are some examples of scaler quantities?

A

speed, distance, mass, temperature, time

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6
Q

How are vectors represented?

A

by an arrow
the length of the arrow shows the magnitude and direction of the arrow shows the direction of the quantity

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7
Q

What is force?

A

a force is a push or pull on an object that is caused by interacting with something

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8
Q

What are the two types of forces?

A

contact and non contact forces

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9
Q

What is a contact force?

A

when two objects have to be touching for a force to act

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10
Q

What is a non contact force?

A

if the objects do not need to touching for the force to act

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11
Q

What is an interactional pair?

A

is a pair of forces that are equal and opposite and act on two interacting objects (basically newtons third law)

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12
Q

What is the sun and the earth attracted to eachother by?

A
  • by gravitational force
  • this is a non contact force
  • an equal but opposite force of attraction is felt by both the sun and the earth
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13
Q

What is mass?

A

-the amount of “stuff” in an object
- for any given object this will have the same value anywhere in the universe

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14
Q

What is weight?

A
  • the force acting on an object due to gravity (the pull of gravitational force on the object)
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15
Q

When is gravitational field strength the easiest?

A
  • its stronger the closer to are to the mass causing the field
  • and stronger for larger masses
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16
Q

What does the weight of an object depend on?

A
  • depends on the strength of the gravitational field at the location of the object
  • the weight of an object changes with its location
17
Q

How is weight measured?

A
  • forced measured in newtons
18
Q

What is the equation for weight?

A

weight= mass x gravitational force

19
Q

What is a single force?

A
  • resultant force
20
Q

When does a force need to be applied?

A
  • to make something move
21
Q

What happens when you push something along a rough surface?

A
  • you are doing work against frictional forces
  • energy is being transferred to the kinetic energy store of the object because it starts moving
  • some is transferred to thermal energy stores due to friction
  • this causes the temp of the object to increase
22
Q

How can you find out how much work is done?

A

work done= force x distance

23
Q

What happens if all of the forces acting on an object?

A
  • they give a resultant force of zero
    -the object is in equilibrium
24
Q

How do forces act?

A
  • horizontally, vertically, awkward angles
25
Q

How do you calculate elastic potential energy?

A

0.5 x spring constant x extension squared