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You can create printable tests and worksheets from these Grade 9 Simple Machines questions! Select one or more questions using the checkboxes above each question. Then click the add selected questions to a test button before moving to another page.

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If a machine has a mechanical advantage less than one, which of the following must be true?
1. The Effort Force is less than the Resistance Force.
2. The Effort Distance is greater than the Resistance Distance.
3. The Effort Distance is less than the Resistance Distance.
4. The Effort Force and Resistance Force are the same.
To increase the DISTANCE that a machine moves a load, you
1. should increase the MA.
2. should decrease the MA.
3. should make the MA 1.
4. should decrease the efficiency.
5. can't change distance, only force.
A catapult is best described as what type of lever?
1. Class 1 Lever
2. Class 2 Lever
3. Class 3 Lever
4. Class 4 Lever
A device that does work with only one movement is called a
1. pulley.
2. compound machine.
3. force.
4. simple machine.
How much work would be required to lift a 25 kg object to a height of 20 meters?
1. 500 Joules
2. 1.25 Joules
3. 245 Newtons
4. 1.25 Newtons
5. 4900 Joules
The force you apply to a machine is the
1. efficiency.
2. input force.
3. output force.
4. resistance.
How would you increase the mechanical advantage of a doorknob?
1. increase the radius of the outer knob
2. increase the radius of the inner cylinder
3. decrease the radius of the outer knob
4. The mechanical advantage of a doorknob is always 1
5. A doorknob is not a simple machine
Which of the following machines ALWAYS increases your force?
1. class 2 lever
2. class 3 lever
3. wheel and axle
4. pulley
5. no machine can increase your force
How much work is done when a 1200N object is raised 6 meters?
1. 200 Joules
2. 200 Newtons
3. 7200 Joules
4. 7200 Newtons
5. None of the above