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1.
The ratio of output force to input force is known as                     .
1. power
3. efficiency
4. pressure
2.
Which of the following units are used to express mechanical advantage?
1. Watts
2. Joules
3. Newtons
4. None of the above
3.
Which of the following could knowing the mechanical advantage of a machine tell you?
1. If the machine increases the effort force.
2. If the machine increases the effort distance.
3. If the machine does not change your effort force.
4. All of the above
4.
Which of the following could not be true?
1. A machine that multiplies the force you put into it
2. A machine that increases the work you put into it
3. A machine that decreases the distance you have to put in
4. A machine that puts out less work than you put in
5.
Which of the following is true about a single, fixed pulley?
1. It has a mechanical advantage less than 1.
2. It has a mechanical advantage equal to 1.
3. It has a mechanical advantage greater than 1.
4. It has no friction.
6.
Austin needs to lift a 300 N object using only 100 N of force. To accomplish this, he will need a simple machine with a mechanical advantage of what?
1. 3
2. 0.3
3. 90%
4. None of the Above
7.
Jacob positions a class 1 lever so that the end he pushes down on is 0.5 m from the fulcrum. The object he is trying to lift is 0.1 m from the fulcrum. What is the IMA of the lever as he has it set up?
1. 0.2
2. 0.5
3. 5
4. 2
8.
If you apply an effort of 240 N to a simple machine with a mechanical advantage of 3, what output force will the machine produce?
1. 240 N
2. 80 N
3. 720 N
4. 243 N
9.
What is the mechanical advantage of a wedge that has a length of 0.08 meters and is 0.04 meters at its widest point?
1. 0.5
2. 0.0032
3. 2
4. None of the above
10.
Grace walks 15 m up an inclined plane. The highest point of the inclined plane is 5 meters above the ground. What does Elizabeth calculate as the ideal mechanical advantage of the plane?
1. 3
2. 0.3
3. 75
4. 20
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