P3: More About Forces Flashcards

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1
Q

Stopping Distance =

A

Thinking Distance + Braking Distance

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2
Q

Thinking Distance

A

Driver’s Reaction Time

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3
Q

Braking Distance

A

Braking Force reaction Time

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4
Q

Weight

A

The force of gravity on an object (N)

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5
Q

Mass

A

The quantity of mass of an object (kg)

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6
Q

Gravitational Field Strength

A

The force of gravity on an object mass of 1kg
(N/kg)
The acceleration of free fall

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7
Q

Earth’s Gravitational Field Strength

A

10 N/kg

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8
Q

Weight =

A

Mass x Gravitational Field Strength

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9
Q

Gravitational Field Strength=

A

Weight/ Mass

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10
Q

If an object falls with only gravity acting on it..

A

… Its resultant force is its weight.

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11
Q

If an object falls in a fluid…

A

… the resultant force is its weight - the frictional force on it.

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12
Q

What speed does an object acted on only by gravity accelerate at?

A

10m/s(2)

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13
Q

Terminal Velocity

A

The velocity reached by an object when the drag force is equal and opposite to the force making it move.

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