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Science Semester 2 > Physics > Flashcards

Physics Flashcards

1
Q

What’s force

A

Force is what you apply to an object

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2
Q

What is Mechanical Advantage

A

The number of times a machine multiples your effort effort force

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3
Q

What is an inclined plane

A

A simple machine with no moving parts. It is simply a straight slanted surface.

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4
Q

What is a lever

A

A simple machine with a rigid bar free to pivot around a fixed point called a fulcrum.

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5
Q

What is a pulley and what does it do

A

A simple machine made with a rope, belt or chain wrapped around a grooved wheel. A pulley works two ways. It changes distance or amount of force.

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6
Q

What is a wheel & axle?

A

It is a large wheel rigidly secured to a smaller wheel called the axle.

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7
Q

What is energy?

A

The ability to do work

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8
Q

What is the equation for work?

A

Work=Force•Distance

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9
Q

What unit do you use for Work?

A

Joules (J)

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10
Q

What unit do you use for Force?

A

Newtons (N)

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11
Q

What unit do you use for Distance?

A

Meters (m)

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12
Q

What unit do you use for Mechanical Advantage?

A

Nothing. Just the number only.

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13
Q

What are 3 ways a simple machine makes work seem easier?

A

Changes distance, changes amount of force required, and changes direction. It does NOT change the amount of work required. The work always stays the same no matter what you use.

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14
Q

What is a potential disadvantage of using a simple machine?

A

Distance and time it takes.

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15
Q

When using a simple machine, what always remains constant?

A

Amount of work done.

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16
Q

What are the four main categories of simple machines?

A

Levers, wheel & axles, inclined planes, and pulleys.

17
Q

How do you calculate the mechanical advantage for an inclined plane?

A

MA=Slope/Height

18
Q

Screws and wedges are what type of simple machine? NAILS NOT INCLUDED.

A

Inclined planes

19
Q

Explain the difference between potential and kinetic energy. What does each depend on for the amount?

A

Potential is when something is NOT moving. The amount of potential energy an object has depends on mass and height. Kinetic energy IS when something IS moving. The amount of kinetic energy an object has depends on mass and speed.

20
Q

What is the law of Conservation of Mass & Energy?

A

Mass & Energy cannot be created or destroyed.

21
Q

When an energy transfer is occurring naturally, when does it stop?

A

When all objects reach equilibrium

22
Q

What is work

A

A force is applied to an object and the object moves in the same direction

Science Semester 2 (2 decks)

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