9.1-9.10 Forces and their effects Flashcards

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1
Q

Give two examples of how an object can interact at a distance without touching

A

.Gravitational Attraction
.Electrostatic attraction/repulsion
.Magnetic attraction/repulsion

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2
Q

How can an object be gravitationally attracted?

A

.An attraction between two objects with mass, the larger the mass the greater attraction

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3
Q

How can an object interact by electrostatic?

A

.A larger charge gives greater force

.Like charges repel, opposite charges attract

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4
Q

How can an object interact magnetically?

A

.A stronger magnet has a stronger field giving a greater force
.Like poles repel, opposites attract

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5
Q

Give two examples forces interacting with contact

A

.Normal contact force

.Friction

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6
Q

How is Friction caused?

A

When rough surfaces are moved

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7
Q

What does a vector have?

A

A size and direction

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8
Q

Give two examples of a vector

A

.Weight
.Velocity
.Force
.Displacement

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9
Q

Give two examples of a scalar

A

.Mass
.Distance
.Speed

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10
Q

Give the four reasons a force can cause a rotation

A

.If an object is attached to a pivot point
.And a force is not applied to the point
.If the force is applied perpendicular to the object
.If the force is applied not perpendicular to the object

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11
Q

What can gears change by rotation?

A

.Speed
.Force
.Rotation

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12
Q

If the first gear is supplying the force what will happen if its connected to the gear with fewer teeth?

A

.The second gear will turn faster
.But with less force
.In opposite direction to the first gear

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13
Q

If the first gear is supplying the force what will happen if its connected to a gear with more teeth?

A

.Turns Slower
.More force
.Opposite direction

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14
Q

How can you reduce unwanted energy transfer with gears?

A

Use lubrication

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15
Q

What direction will the second gear always turn in?

A

The opposite direction

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