Have an account?
Skip to Content
Build your own quiz
Suggestions for you
50 questions
Show Answers
See Preview
- 1. Multiple Choice
Any device that helps us do work is called.
A producer
A machine
An animal
A contraption
- 2. Multiple Choice
The 6 simple machines are...
Lever, nail, screw, pulley, wedge, wheel & axle
Hammer, inclined plane, screw, pulley, nail, wheel & axle
Lever, inclined plane, screw, pulley, wedge, wheel & axle
Inclined plane, diamond, pulley, wedge, metal, wheel & axle
- 3. Multiple Choice
Input and output forces are measured in...
Kilograms
Pounds
Newtons
Joules
- 4. Multiple Choice
The formula for finding the speed ratio is...
input distance / output distance
object slope / height
object slope / speed
output distance / input distance
- 5. Multiple Choice
____________________ is a force that opposes motion.
Angle
Twisting
Friction
Speed
- 6. Multiple Choice
The formula for calculating the Mechanical Advantage is...
Output Force / Input force = MA
Input force / Output force = MA
Direction x Angle = MA
Angle x Speed = MA
- 7. Multiple Choice
You are trying to move a heavy rock. The pulley system is 87% efficient, the inline plane is 56% efficient and the lever is 84%. Which machine should you choose?
Incline plane
Pulley
Lever
- 8. Multiple Choice
37 Newtons of force are required to lift a mass 3.5 meters above the floor. How many Joules of work is done?
12.95
129.5
1295
1480
- 9. Multiple Choice
Hydraulic systems use ________ to transfer force from one point to another.
Air
Liquid
Solid
Gas
- 10. Multiple Choice
Air is compressible and liquid is incompressible.
True
False
- 11. Multiple ChoiceWhen a machine takes a small input force and increases the magnitude of the output force, WHAT HAS BEEN PRODUCED?EnergyMechanical AdvantageThe conversion of rotational (turning) motion to linear motion (movement in a straight line).Work
- 12. Multiple ChoiceWhich of these is not a force?Mechanical AdvantageFrictionGravityBuoyancy
- 13. Multiple Choice
Which of these is not a simple machine?
Scissors
Screw
Wheel and axle
Pulley
- 14. Multiple ChoiceWhat is the purpose of machines?To recapture lost energy of prevent energy from escaping in the first placeTo reduce the amount of friction between two sliding partsTo measure of how strong force isTo help us use energy more efficiently/ do work easier.
- 15. Multiple Choice
How does an inclined plane help us do work?Allows us to move heavy objects using a smaller forceMagnifies input forceCan be used to increase the size of the force or the speedBy minimizing any force lost because of friction/slippage. - 16. Multiple ChoiceWhat two forces are involved when a machine is used to do work?push & pullinput force & output forcegravity & buoyancyweight & gravity
- 17. Multiple ChoiceWhat is mechanical advantage?Basic accuracy training.A measure of how strong the force of gravity is between two objects.When a machine reduces the chances of effectiveness.A measure of how much easier the machine makes the work.
- 18. Multiple Choice
Force is measured in:
Metres
Joules
g/cm3
Newtons
- 19. Multiple ChoiceWhat is friction?The force that resists motion between two objects in contactThe mechanical advantage in a “perfect” worldThe moment when a specific technological shift hits mainstream societyA substance that helps parts of a system work efficiently
- 20. Multiple ChoiceWhich of the following is used to decrease friction?Slip resistant shoesRubbing sticks together to make fireSki waxRough surfaces
- 21. Multiple Choice
If the output (driven) gear is smaller than the input (driving) gear, the speed will
increase
be constant
decrease
there is not enough information
- 22. Multiple ChoiceThe dirt road rubs against the tires of the motorcycle and most likely causes it to ―go faster because of frictionchange directionsgo slower because of frictionwin a race
- 23. Multiple Choice
What is effort (input) force?
the force one exerts on a machine
the force which an effort force must overcome in order to do work on an object via a simple machine.
the force the machine exerts on a object
the output work times the input distance
- 24. Multiple Choice
A machine with a mechanical advantage greater than 1:
multiplies the input force so the machine would be good to help move heavy objects.
does not multiply the force, but increases distance and speed.
has no effect on speed or effort force
- 25. Multiple Choice
A machine with a mechanical advantage of less than 1:
multiplies the input force so the machine would be good to help move heavy objects.
does not multiply the force, but increases distance and speed.
does not affect distance or speed
- 26. Multiple Choice
A machine with a mechanical advantage equal to 1:
multiplies the input force so the machine would be good to help move heavy objects.
does not multiply the force, but increases distance and speed.
does not affect distance or speed
- 27. Multiple Choice
To increase the mechanical advantage of a lever
make sure the fulcrum is in the middle of the lever
move the fulcrum closer to the load
move the fulcrum closer to the person
use a bigger fulcrum
- 28. Multiple ChoiceIf the weight of the block is 10N, how much force does one have to apply to lift it using this pulley (MA=2)?2N5N10N15N
- 29. Multiple Choice
Jeff is a landscaping contractor and lifts a rock weighing 600 Newtons by wedging a board under the rock. Jeff weighs 150 Newtons and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?
0
2
4
0.25
- 30. Multiple Choice
What is the mechanical advantage of the lever shown?
10
0.1
50
250
- 31. Multiple Choice
What is the unit for measuring work?
Newton
Joule
Watt
meter
- 32. Multiple Choice
Two people shove on a wall with 100 N of force. The wall doesn’t move. How much work is done?
100J
100N
0J
0N
- 33. Multiple Choice
For work to be done on an object, the direction and force have to be going the same direction.
True
False
- 34. Multiple ChoiceWhich is doing work?pushing a wallholding a boxpicking up a pencilsitting in a chair
- 35. Multiple Choice
The _______ the force the _______ work is done
less, more
smaller, more
bigger, more
bigger, less
- 36. Multiple Choice
A simple machine reduces the amount of work needed to accomplish a task.
true
false
- 37. Multiple Choice
What is the efficiency of the following simple machine?
85%
3%
33%
39%
- 38. Multiple ChoiceThe efficiency of a machine can be increased by reducing __________________________.effortresistance frictionfulcrumfriction
- 39. Multiple Choice
Why can mechanical efficiency never be 100%?
No machine is strong enough.
Machines are too big to allow for 100% efficiency.
It can be 100%.
Some energy is lost in the form of heat/sound due to friction.
- 40. Multiple Choice
What does friction produce that reduces efficiency?
heat
water
energy
work
- 41. Multiple Choice
_____________ is a measure of how much of the work is changed into useful work
Efficiency
Energy
Joule
Newton
- 42. Multiple Choice
What happens to the overall efficiency of a machine as I add more machines?
For each simple machine you add, the overall efficiency increases because it gets faster.
For each simple machine you add, the overall efficiency decreases.
The overall efficiency is divided in half for every simple machine you add.
There is no connection.
- 43. Multiple Choice
What do we call the gear connected to the input power source, such as a motor?
Driven Gear
Bigger Gear
Smaller Gear
Driving Gear
- 44. Multiple Choice
What do we call the gear connected to the output, such as a wheel or mechanism in a system?
Driving Gear
Driven Gear
Bigger Gear
Smaller Gear
- 45. Multiple Choice
When you have a system with a driving gear that is _______ than the driven gear, you will increase torque and decrease speed.
smaller
bigger
same size
thicker
- 46. Multiple Choice
Identify this simple machine
Lever
Wheel & Axle
Inclined Plane
Screw
- 47. Multiple ChoiceTwo examples of a pulley...knife & axe bladelightbulb & screwflagpole hoist & window blindscatapult & teeter totter
- 48. Multiple ChoiceThe device used to raise a flag up a flag pole is an example of awheel and axleleverinclined planepulley
- 49. Multiple ChoiceThis devicewedgeleverincline planewheel and axle
- 50. Multiple ChoiceThe fixed point on the lever is calledloadresistancebarfulcrum
- Answer choicesTagsAnswer choicesTags