Worksheets213 ppt 7 mechanical advantage quiz
Total questions: 28
Worksheet time: 14mins
What is the term "mechanical advantage" used to describe?
The use of tools and equipment to make tasks easier
The process of making machines more complex
The reduction of input force to a lesser output force
The elimination of manual labor
What do machines do to the input force according to the concept of mechanical advantage?
Reduce it to a lesser output force
Multiply it to a greater output force
Convert it to electrical energy
Eliminate it completely
Why is using a spanner considered a mechanical advantage?
It is smaller and more compact
It is longer and acts as a bigger lever
It requires more manual effort
It is made of metal
Into how many categories do levers fall?
Two categories
Four categories
Three categories
Five categories
In a first-class lever, where is the fulcrum located?
At one end
In the middle
At the resistance side
At the effort side
Which of the following is an example of a first-class lever?
Wheelbarrow
Crowbar
Tweezers
Fishing rod
In a Class 2 lever, where is the resistance located?
At the fulcrum
In the middle
At the end
On both sides
Which of the following is an example of a Class 2 lever?
Scissors
Wheelbarrow
See-saw
Hammer
In a third-class lever, where is the effort located?
In the middle
On one side
At the fulcrum
At the resistance
Which of the following is an example of a third-class lever?
A pair of tweezers
A seesaw
A wheelbarrow
A crowbar
What is the formula for calculating effort in lever calculations?
Effort = (Load x Load to fulcrum distance) / Effort to fulcrum distance
Effort = (Effort x Load to fulcrum distance) / Load
Effort = (Load x Effort to fulcrum distance) / Load to fulcrum distance
Effort = (Load to fulcrum distance) / (Load x Effort to fulcrum distance)
What is the effort needed to lift a packing case with a load of 1,200N, if the load is 10cm from the pivot and the effort is 1.0m from the pivot?
120N
100N
150N
200N
What is a 'moment' in the context of physics?
A) A measure of time
B) A turning force around a pivot
C) A unit of mass
D) A type of energy
What condition is described when the moments of clockwise and anticlockwise forces are equal?
A) Acceleration
B) Equilibrium
C) Friction
D) Inertia
Where is the pivot located when weights are balanced at either end?
A) At the top of the lever
B) At the center of gravity
C) At the bottom of the lever
D) At the end of the lever
What is the primary mechanical advantage of using pulleys?
They increase speed.
They reduce the amount of force needed to lift a load.
They increase the weight of the load.
They decrease the distance a load can be moved.
According to the image, what happens when another wheel is added to a pulley system?
The mechanical advantage decreases.
The mechanical advantage remains the same.
The mechanical advantage increases.
The load becomes heavier.
What is the force required to lift 180N in mass using a 3 pulley system?
60 N
90 N
120 N
180 N
What does the term 'action and reaction' refer to?
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
Newton's law of universal gravitation
According to Newton's third law, what happens when a hammer exerts a force on a nail?
The nail exerts a smaller force back on the hammer
The nail exerts no force back on the hammer
The nail exerts an equal and opposite force on the hammer
The nail exerts a greater force back on the hammer
What is the mechanical advantage of using a longer spanner?
It increases the force required to turn a nut
It reduces the force felt at the hand holding the spanner
It has no effect on the force required
It increases the force felt at the hand holding the spanner
What is the principle of using different diameter pulleys or gears to achieve a different rotation speed in RPM called?
Gear ratio
Velocity ratio
Speed ratio
Rotation ratio
If a 200mm driver pulley rotates at 200 RPM, what is the speed of a 400mm driven gear?
50 RPM
100 RPM
150 RPM
200 RPM
What is the velocity ratio when a 200mm driver pulley rotates at 200 RPM and a 400mm driven gear rotates at 100 RPM?
1:1
2:1
3:1
4:1
How does a screw drive itself into wood?
By using the flute or thread
By using a hammer
By using a lever
By using a pulley
What was the original use of the Archimedes screw?
As a water lifting device
As a tool for drilling holes
As a mechanism for crushing grains
As a device for measuring wind speed
What happens if a screw is fixed and cannot move, but still turns?
The wood would be pulled to the screw
The screw would break
The wood would split
The screw would stop turning
In what other application are Archimedes screws used ?
In biomass hoppers to move fuels to the boiler
In wind turbines to generate electricity
In engines to increase speed
In clocks to keep time
