Mechanical Advantage Worksheet
Explore the principles of mechanical advantage, ideal mechanical advantage, and efficiency in simple machines with this Grade 11 science worksheet.
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Mechanical Advantage: Simple Machines
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which of the following is the primary purpose of a simple machine?
To increase the amount of work done.
To change the direction or magnitude of a force.
To generate energy.
To reduce friction.
2. A machine with an ideal mechanical advantage (IMA) of 4 means that:
The output force is 4 times the input force.
The input force is 4 times the output force.
The machine is 4% efficient.
The machine does 4 Joules of work.
3. Mechanical advantage is the ratio of the output force to the force.
4. The efficiency of a machine is always less than 100% due to .
5. An inclined plane reduces the force required to move an object by increasing the over which the force is applied.
6. A machine can increase both force and distance simultaneously.
True
False
7. The mechanical advantage of a single fixed pulley is always 1.
True
False
8. A worker uses a lever to lift a 200 kg rock. If the output force required is 250 N and the input force applied is 50 N, what is the actual mechanical advantage (AMA) of the lever?
9. An inclined plane is 10 meters long and 2 meters high. Calculate its ideal mechanical advantage (IMA).
10. Discuss the relationship between ideal mechanical advantage, actual mechanical advantage, and efficiency of a machine. Provide an example of how friction affects the actual mechanical advantage and efficiency.
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