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WorksheetsSimple Machines Quiz
Total questions: 25
Worksheet time: 14mins
Simple machines allow engineers to:
Reduce total work
Eliminate friction
Change the magnitude or direction of force
Replace compound machines entirely
Work is calculated by which formula?
W = F / d
W = F × d
W = m × g
W = P / t
Which is not one of the six simple machines?
Lever
Wheel and Axle
Pulley
Gear
Ideal Mechanical Advantage (IMA) assumes:
Real forces and friction
Zero friction
Maximum power output
Constant acceleration
Actual Mechanical Advantage (AMA) is calculated by:
Effort ÷ Resistance
Distance effort ÷ Distance resistance
Resistance force ÷ Effort force
Input work + Output work
Adding more supporting strands to a pulley system:
Increases effort force
Decreases mechanical advantage
Increases mechanical advantage
Has no effect
Energy that results from motion is called:
Potential energy
Kinetic energy
Elastic energy
Chemical energy
Power is defined as:
Work × time
Work ÷ time
Force × mass
Mass × acceleration
Efficiency is calculated by:
(Work in ÷ Work out) × 100
(Work out ÷ Work in) × 100
(Force in ÷ Force out) × 100
(Power in ÷ Power out) × 100
Which factor most reduces efficiency in mechanical systems?
Short distances
Light loads
Friction
Constant speed
Gear ratio is calculated using:
Diameter of driver ÷ diameter of driven
Teeth of driven ÷ teeth of driver
RPM of driver × torque of driven
Teeth of driver ÷ pitch
A high gear ratio (e.g., 7:1) typically improves:
Speed
Torque
Accuracy
Precision
Adding an idler gear changes:
Gear ratio
Power
Direction of rotation
Motor torque
A crank-and-slider converts:
Rotary → Linear
Linear → Rotary
Reciprocating → Rotary
All of the above
A cam-and-follower produces what type of output motion?
Rotational
Linear
Reciprocating
Oscillating
When designing motion-conversion mechanisms, engineers must ensure that:
Input and output motions are identical
Each component includes at least two motion types
Steps are independent
No energy is lost
A robot must include which of the following to be considered a robot?
A user interface
Sensors, structure, and actuation
Autonomous navigation
Artificial intelligence
Which of the following is an example of motion conversion?
Rotary → Linear
Linear → Stationary
Reciprocating → Rotary
Both A and C
What is the primary focus when designing motion-conversion mechanisms?
Ensuring energy is lost
Making input and output motions identical
Including at least two motion types in each component
Keeping steps independent
Which lever would be the easiest to lift the load?
A
B
C
Which ramp will require the least amount of force?
A
B
C
D
