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Physics > P8 > Flashcards

P8 Flashcards

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1
Q

What is displacement

A

Distance without a change in direction

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2
Q

What is a vector quantity

A

A physical quantity with magnitude and direction

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3
Q

What is a scaler quantity

A

Quantitys with magnitude but no direction

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4
Q

Three examples of a vector quantity

A

Displacement
Velocity
Force

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5
Q

Three examples of a scalar quantity

A

Volume speed time

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6
Q

What are the two types of forces

A

Contact and non contact forces

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7
Q

Example of a contact force

A

Friction,tension

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8
Q

Example of a non contact force

A

Gravity,Magnetic force

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9
Q

What is newtons third law of motion

A

Every reaction has an equal and opposite reaction

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10
Q

What are the 5 main forces acting on a moving car

A

Air resistance,reaction force,friction,weight,thrust

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11
Q

What is a balanced force

A

If the resultant force acting on the object is 0 the object is said to be balanced

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12
Q

What is an unbalanced force

A

If the resultant force acting on an object is not 0 the object is said to be unbalanced

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13
Q

What is a moment

A

A turning force around a pivot

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14
Q

What are the ways to increase a moment

A

Increase force or increase distance from pivot

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15
Q

What is a lever

A

A rigid body capable of lifting a heavy load with a small effort

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16
Q

Calculation for moment

A

ForceXDistance

17
Q

Equation for moments in terms of gears

A

Moment=forceXgear radius

18
Q

What is the equation for gear ratio

A

Gear ratio=number of teeth on the driven/number of teeth on the driver

19
Q

What is the centre of mass

A

The point at which an objects mass can be thought as being concentrated

20
Q

How do you find the centre of mass of a regularly shaped object

A

Draw lines of symettery and wherever they meet is the centre of mass

21
Q

Calculation for acceleration including velocity and time

A

Acceleration=change in v/time

Physics (10 decks)

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