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Mechanical Systems > Mechanical Systems > Flashcards

Mechanical Systems Flashcards

1
Q

what do mechanical systems have?

A

All mechanical systems have a source of energy.

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2
Q

List the Classical Simple machines:

A

Inclined Plane, lever, wedge, wheel and axle, pulley and screw.

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3
Q

What does a Screw do?

A

It is a mechanism that converts rotational motion to linear motion.

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4
Q

What does a wedge do?

A

Designed to separate two objects, lift up an object, or hold an object in place.

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5
Q

What is the fixed point called?

A

The fulcrum

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6
Q

What is effort force?

A

The force you put or exert on a lever to make it move.

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7
Q

What is load?

A

The mass of an object moved or lifted by a machine such as a lever.

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8
Q

What is effort arm?

A

The distance between the fulcrum and the effort force.

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9
Q

What is load arm?

A

The distance between the fulcrum and the load.

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10
Q

What is class 1 lever?

A

The fulcrum is between the effort force and the load. Example: Scissors

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11
Q

What is class 2 lever?

A

Class 2 lever is when the load is in the middle and the effort is on the right side. Example: Wheel barrow.

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12
Q

What is class 3 lever?

A

The effort is in the middle and the load is on the right side.

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13
Q

What is an inclined plane?

A

A ramp or slope that reduces the amount of force or work you need to exert to lift something.

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14
Q

What is a winch?

A

Consists of a smaller cylinder and a crank or handle.

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15
Q

What is a gear?

A

A rotating wheel like object with teath around its rim.

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16
Q

What is a gear train?

A

A group of two or more gears.

17
Q

What is a driving gear?

A

First gear, the one in which the intintial force is applied.

18
Q

What happens when gears are in contact?

A

Turn in opposite directions.

19
Q

Sprockets and Chains

A

Turn in the same direction.

20
Q

What is kinetic energy?

A

Kinetic energy= Energy in motion

21
Q

What is potential energy?

A

Stored energy.

22
Q

Transmission

A

Energy can be transmitted from one place to another, but energy can’t be converted or changed.

23
Q

WORK:

A

Work is energy in action: you do work on the object. Work is energy in action. Work is measured in newtons.

24
Q

Speed Ratio is:

A

The relationship between the speeds of rotations of a smaller gear and a larger gear.

25
Q

What is a driven gear?

A

Second gear, the one that gets driven.

26
Q

What does a pulley do?

A

A machine that reduces the amount of force you put on an object to lift it. A pulley helps change the direction of force.

27
Q

What is a fixed pulley?

A

A pulley that is attached to something that does not move.

28
Q

What is energy?

A

The ability to do work. Energy is how things change and move.

29
Q

What is friction?

A

Friction is the force that opposes motion. Friction is caused by the roughness of materials.

30
Q

What is efficiency?

A

A measure of how well a machine or a device uses energy. Efficiency in physics is a comparison of the energy output to the energy input in a system.

31
Q

What is input work?

A

The work you do on a machine is input work.

32
Q

What is output work?

A

The work the machine does on the load.

33
Q

What does a wheel and axle do?

A

Two turning objects that are attached to each other to turn or move.

34
Q

Block and tackle pulleys:

A

A combination of a fixed pulley and a movable pulley, sometimes used to lift hard a weird loads.

35
Q

Compound pulley:

A

A combination of several pulleys working together.

36
Q

Mechanical Advantage:

A

The comparison of the size of the load to the size of the effort force. Mechanical advantage is measured in newtons.

37
Q

what is speed:

A

the rate of motion, or when an object changes it’s position.

Mechanical Systems (1 decks)

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