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- Slides: 74
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$100 $200 $200 $100 $200 $300 $300 $400 $400 $500 $500 8
What occurs when a force causes an object to move in the same direction as the force? 9
Work 10
What is the rate at which work is done? 11
Power 12
The amount of work you do on a machine is called: 13
Work Input 14
A machine that consists of more than one simple machine is called a: 15
Compound Machine 16
This is a comparison of a machine’s work output with the work input. 17
Mechanical Efficiency 18
Fxd=? 19
Work 20
The number of times a machine multiplies an effort force. 21
Mechanical Advantage 22
The fixed point on a lever is called? 23
Fulcrum 24
Weight is a measure of what force? 25
Gravity 26
An incline plane wrapped in a spiral around a cylindrical post is called a ____. 27
Screw 28
The unit for work is the: 29
Joule (J) 30
This type of pulley is attached to the object being moved. 31
Movable Pulley 32
The type of machine in which work input equals work output is a(n) ____ machine. 33
Ideal 34
What type of machine is shown here? 35
Mechanical Efficiency (ME) 36
What is the gear ratio? 37
30/60=1/2=0. 5 38
How much work is done lifting a 50 N object a distance of 4 meters? W=Fxd 39
200 J 40
A wheel with teeth along its circumference. 41
Gear 42
How much work is done by a student just holding a 3 N book over their head that is 2 m off the ground? 43
0 J 44
A grooved wheel with a rope or chain running along the groove. 45
Pulley 46
A ____ machine does work with only one movement. 47
Simple 48
What can you reduce to increase mechanical efficiency? 49
Friction 50
An incline plane with one or two sloping sides. 51
Wedge 52
A device that makes work easier. 53
Machine 54
Simple machine made up of two wheels of different sizes that rotate together. 55
Wheel and Axle 56
An incline plane increases ______ and reduces ______ to move an object. 57
Distance Force 58
There are this many types of simple machines? 59
6 60
2. Which of these cannot be done by a machine? Multiply force Multiply Energy Work Change direction of force 61
100% 62
Name the six simple machines: 63
Lever, wheel and axle, pulley, inclined plane, wedge, and screw 64
Which is always greater than the other? AMA or IMA 65
IMA 66
What happens to the IMA of an inclined plane as the slope increases? Increase or decrease 67
Decrease 68
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4. A lever can be used to multiply ________ or change _______. direction, force power, direction length, force, direction 70
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The pivot point of lever is called Add lever pict 73
Which object is a lever? 74