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physics - forces Flashcards

1
Q

What is the unit used for forces?

A

Newton (N)

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2
Q

What equipment is used to measure forces?

A

Newton meter

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3
Q

Is force a scalar or vector quantity?

A

vector

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4
Q

What is a resultant force?

A

The overall force acting on an object when all the individual forces on it are combined

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5
Q

What is resolving a force into components?

A

Finding two forces acting at right angles that have the same effect as the single original force

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6
Q

What is friction?

A

A force that acts to slow the motion of an object

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7
Q

What is air resistance?

A

A friction force due to an object moving through air

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8
Q

what is the force of an object being stretched?

A

tension

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9
Q

What is the force that acts between two solid objects that are touching?

A

Normal contact force

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10
Q

What is the weight force?

A

the force acting on an object due to gravity

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11
Q

What is the equation for the weight force?

A

weight = mass x gravitational field strength

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12
Q

What is the unit for gravitational field strength?

A

Newtons per kilogram (N/Kg)

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13
Q

Where on an object does the weight force act

A

The centre of mass

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14
Q

What is the acceleration due to gravity near the surface of the earth?

A

9.8 m/s

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15
Q

What is newton’s first law of motion?

A

If there is no resultant force on an object it continues moving at the same speed in the same direction

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16
Q

What is the name for the tendency of an object to remain at rest or move with constant velocity?

A

Inertia

17
Q

What is newton’s second law of motion?

A

resultant force = mass x acceleration

18
Q

What is the definition of inertial mass

A

How difficult it is to change the velocity of an object

19
Q

What is the equation for inertial mass?

A

inertial mass = resultant force / acceleration

20
Q

What is terminal velocity?

A

The maximum speed an object can fall through a liquid or gas

flashcards (3 decks)

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