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Physics GCSE > Forces In Balance > Flashcards

Forces In Balance Flashcards

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1
Q

Example of a scalar quantity

A

Distance

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2
Q

What is a scalar quantity?

A

Just a magnitude

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3
Q

What is a vector quantity?

A

Direction and magnitude

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4
Q

Example of a vector quantity?

A

Displacement

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5
Q

What are forces?

A

Interactions between objects

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6
Q

What is force measured in?

A

Newtons (N)

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7
Q

Examples of Non-Contact forces

A

Gravitational force, Magnetism, Electrostatic

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8
Q

Examples of Contact forces

A

Normal force, Tension, Friction, Air resistance, Water resistance, Upthrust, Thrust

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9
Q

What is Newton’s third law?

A

For every action there is an equal and opposite reaction

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10
Q

What is the equation for weight?

A

Weight = Mass x Gravitational Field Strength

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11
Q

What is weight measured in?

A

Newtons (N)

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12
Q

What is mass measured in?

A

Kilograms (kg)

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13
Q

What is gravitational field strength measured in?

A

Newtons per kilogram (N/kg)

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14
Q

What are resultant forces?

A

The result of other forces

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15
Q

Where is the centre of mass in a symmetrical object?

A

The point where it’s axes of symmetry meet

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16
Q

What is the centre of mass?

A

A point where all the weight can be considered to act from

17
Q

What is the equation for moment?

A

Moment = Force x Distance

18
Q

What is moment measured in?

A

Newton metres (Nm)

19
Q

What is equilibrium?

A

When two forces are balanced

20
Q

What is work done?

A

Energy transferred

21
Q

What is the equation for work done?

A

Work done = Force x Distance

22
Q

When two forces are acting in the same direction on an object how do you calculate the resultant force?

A

Add the forces

23
Q

When two forces acting in opposite directions how do you calculate the resultant force?

A

Subtract the forces

24
Q

What is a free body diagram?

A

A diagram that shows all forces acting on one object

25
Q

What does the length of a force arrow indicate?

A

Magnitude of the force

26
Q

What is a parallelogram of force used to calculate?

A

The resultant force acting on an object when the forces aren’t in parallel

27
Q

When a resultant force is 0 what is the object’s motion?

A

Stationary or moving at a constant speed in a straight line

28
Q

What is the resultant force of an object that is in equilibrium?

A

Zero

29
Q

What is the gravitational field strength of earth?

A

9.8N/kg

Physics GCSE (9 decks)

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