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Physics > Speed / Momentum / Force / Work Done > Flashcards

Speed / Momentum / Force / Work Done Flashcards

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1
Q

What is a scalar quantity?

A

A quantity with a magnitude only

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2
Q

What is a vector quantity?

A

A quantity with a magnitude and direction

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3
Q

What is a contact force?

A

When two objects are physically touching

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4
Q

What is a non-contact force?

A

Objects are physically separated

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5
Q

How do you measure the weight of an object?

A

Weight - gravitational field strength x mass

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6
Q

What is the centre of mass?

A

The point at which an object is thought to be concentrated

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7
Q

What is the resultant force?

A

The final force acting on an object when all other forces are taken into consideration

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8
Q

What is newtons first law?

A

Objects that are in motion tend to stay in motion, and objects that are at rest tend to stay at rest

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9
Q

What is newtons second law?

A

Force - mass x acceleration

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10
Q

What is newtons third law?

A

Every action has an equal and opposite reaction

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11
Q

How do you calculate work done?

A

Work done - force x distance

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12
Q

What is compression?

A

Pushing an object together

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13
Q

What is tension?

A

Stretching an object out

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14
Q

What is hooks law?

A

The extension of a spring is directly proportional to the force applied, provided its limit of proportionality is not exceeded (elastic limit)

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15
Q

How do you work out force applied?

A

Spring constant x extension

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16
Q

How do you work out stopping distance?

A

Thinking distance x breaking distance

17
Q

How do you work out force?

A

Mass x acceleration

18
Q

How do you work out speed?

A

Distance divided by time

19
Q

How do you work out momentum?

A

Mass x velocity

20
Q

How do you work out acceleration?

A

Velocity divided by time

21
Q

What is momentum?

A

The quantity of motion of a moving object

22
Q

What is the conservation of momentum?

A

In an isolated system, momentum remains constant

23
Q

What are the steps of working out momentum?

A

Calculate total momentum of both objects, calculate the mass of both objects, then divide the total momentum by the total mass

Physics (12 decks)

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