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School Study > Physics ( forces) > Flashcards

Physics ( forces) Flashcards

1
Q

What’s the equation of weight

A

Weight=mass x gravitational field strength

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2
Q

What is weight proportional to

A

Mass and weight are directly proportional

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3
Q

What is the resultant force of an object

A

The overall force acting on an object in a direction

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4
Q

What’s the equation of work done

A

Work done= force x distance

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5
Q

Stretching, bending and compressing does what

A

Transfers energy

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6
Q

What’s the equation of force when relating to springs

A

Force= spring constant x extension

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7
Q

What’s the equation of elastic potential energy

A

Elastic potential energy= 1/2 x spring constant x extension’2

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8
Q

What’s a moment

A

The turning effect of a force

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9
Q

What’s the equation of the moment of force

A

Moment of force= force x distance

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10
Q

What’s fluid pressure

A

When particles in a fluid collide with the walls of a container. Exerting a force

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11
Q

What’s the equation of pressure

A

Force normal to surface
Pressure =————————————
Area of that surface

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12
Q

What does the pressure of a liquid depend on

A

Depth and density

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13
Q

What do objects in fluids experience

A

Upthrust. However if upthrust and weight = the same. The object floats

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14
Q

What’s speed

A

How fast your going but with no regard to direction

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15
Q

What’s velocity

A

How fast your going in a given direction

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16
Q

Speed is an example of a

A

Scaler

17
Q

Velocity is an example of a

A

Vector

18
Q

What’s the equation of acceleration

A

Change in velocity
Acceleration = —————————
Time

19
Q

What’s acceleration

A

How quickly your speeding up( change in velocity in an amount of time)

20
Q

Whats uniform speed also mean

A

Constant acceleration

21
Q

What’s the equation of final velocity

A

V’2 - u’2= 2 as

22
Q

What’s stopping distance

A

The distance needed for a car traveling at a given speed to stop. Depends on: • thinking distance
• Braking distance

23
Q

What’s thinking distance

A

Distance traveled before our brain reacts to danger
Depends on: •alcohol
• tiredness

24
Q

What’s braking distance

A

Distance traveled by the car after brakes have been pressed. Depends on: • initial speed
• weight of car
• quality of brakes
• condition of tires

25
Q

What’s the equation for mass

A

Weight
Mass = —————————————
Gravitational field strength

26
Q

What can the equation

Ee = 1/2 x spring constant x extension 2

A

This equation can also be used to find the energy stored

School Study (8 decks)

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