Chapter 4 - More About Force Flashcards

1
Q

What opposes driving force?

A

Friction and air resistance

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2
Q

What does stopping distance depend on?

A

Thinking and braking distance

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3
Q

What factors increase braking distance?

A

Poor weather conditions, high speed and poor vehicle conditions

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4
Q

What factors increase thinking distance?

A

High speed, distractions and poor reaction time

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5
Q

Why would you need a greater braking force for a vehicle?

A

High mass

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6
Q

What is the weight of an opject?

A

The gravitational force acting on it

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7
Q

What is the mass of an object?

A

Quantity of matter in an object

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8
Q

How fast does an object accelerate if only acted on by gravity?

A

10m/s²

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9
Q

What is terminal velocity?

A

The velocity an object eventually reaches in a fluid

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10
Q

What is the weight of an object equal to at terminal velocity?

A

The frictional force

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11
Q

What is the frictional force in air?

A

Air resistance

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12
Q

When is an object considered elastic?

A

If it returns to its original shape after removing the deforming force acting on it

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13
Q

What is the extension equal to?

A

Difference between length at the stage - original length

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14
Q

State Hooke’s Law

A

The extension of a spring is directly proportional to the force applied to it as long as the limit of proportionality isn’t exceeded

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