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Physics GCSE > Contact and Non-contact forces. And Gravity > Flashcards

Contact and Non-contact forces. And Gravity Flashcards

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1
Q

What do vector quantities and scalar quantities have in common?

A

They both include magnitude.

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2
Q

What is the difference between vector quantities and scalar quantities?

A

Vector includes both magnitude and direction whereas scalar quantities does not include direction.

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3
Q

Examples of vector quantities

A 
Velocity
Momentum
Force
Acceleration
Weight
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4
Q

Example of Scalar quantities.

A

Speed
Mass
Distance
Temperature

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5
Q

What are the two categories of forces?

A

Non-contact and contact

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6
Q

What is a non-contact force?

A

Non-contact force is a force that can act without the need of two objects touching.

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7
Q

Examples of non-contact force.

A

Gravity

Magnetism

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8
Q

What is a contact force?

A

A force that requires two objects to be touching in order to act.

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9
Q

Examples of contact force.

A

Friction
Tension
Air resistance

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10
Q

What do we use to measure weight?

A

Newton meter (calibrated spring balance)

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11
Q

Is weight a vector quantity?

A

Yes

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12
Q

Is wight a scalar quantity?

A

No

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13
Q

What is a vector represented with?

A

An arrow

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14
Q

What does the length of the arrow and the direction of an arrow in a vector represent?

A

The direction of the arrow represents the direction.

The distance represents the magnitude.

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15
Q

What are forces always in an interaction pair always in?

A

Equilibrium and in opposite direction.

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16
Q

Forces always act from where?

A

Centre of mass.

17
Q

What is the different between mass and weight.

A

Mass is constant whereas weight changes depending on location.

18
Q

What is gravitational field strength?

A

The strength of gravity where you are.

19
Q

What changes somethings gravitational field strength?

A

When mass changes, gravitational field strength changes. They are directly proportional to one another.

20
Q

What is the unit of gravitational field strength and what is it measured in?

A

Gravitational field strength (g) is measured in newtons per kilogram (N/kg).

21
Q

What is the relationship between wight and mass?

A

They are directly proportional.

22
Q

What is the formula for weight?

A

Weight(N) = Mass(kg) x Gravitational Field Strength (N/KG)

Physics GCSE (5 decks)

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