3A1 Chapter 7: Simple Machines,
Pressure, Density & Flow fully solved
rated A+
Device that receives energy and uses it to perform work - correct answer ✔✔Machine
Device that receives energy from single input force and performs work by producing single output force -
correct answer ✔✔Simple machine
Force applied to simple machine - correct answer ✔✔Effort
Force that simple machines produce - correct answer ✔✔load
A force acting through a distance - correct answer ✔✔Work
Load / effort = - correct answer ✔✔Mechanical advantage
effort / load - correct answer ✔✔velocity ratio
If a machine has no losses, efficiency would be 100% and MA = VR - correct answer ✔✔Ideal machine
MA / VR - correct answer ✔✔Efficiency
Work output / work input = - correct answer ✔✔Efficiency
Ideal MA = - correct answer ✔✔VR
, Obtains mechanical advantage from force moments created by 2 connected components of different
radius/diameter - correct answer ✔✔Wheel & axle
Wheel and axle VR = - correct answer ✔✔R / r
effort x distance moved by effort = - correct answer ✔✔work in
load x distance moved by load = - correct answer ✔✔work out
efficiency x VR - correct answer ✔✔MA
Simple machine that uses set of pulleys with single rope/chain/cable - correct answer ✔✔Pulley System
Pulley system downward effort VR = - correct answer ✔✔# pulleys
Pulley system upward effort VR = - correct answer ✔✔# pulleys + 1
Screw jack efficiency is considered to be - correct answer ✔✔Low
Produces MA by application of a turning force to a threaded spindle - correct answer ✔✔Screw Jack
Distance from the top of one thread to the bottom of another - correct answer ✔✔Pitch of a screw
thread
Distance the screw moves when it is turned through one complete revolution - correct answer ✔✔Load
For a one start thread, lead = - correct answer ✔✔pitch
For a two start thread, lead = - correct answer ✔✔2 x pitch
Pressure, Density & Flow fully solved
rated A+
Device that receives energy and uses it to perform work - correct answer ✔✔Machine
Device that receives energy from single input force and performs work by producing single output force -
correct answer ✔✔Simple machine
Force applied to simple machine - correct answer ✔✔Effort
Force that simple machines produce - correct answer ✔✔load
A force acting through a distance - correct answer ✔✔Work
Load / effort = - correct answer ✔✔Mechanical advantage
effort / load - correct answer ✔✔velocity ratio
If a machine has no losses, efficiency would be 100% and MA = VR - correct answer ✔✔Ideal machine
MA / VR - correct answer ✔✔Efficiency
Work output / work input = - correct answer ✔✔Efficiency
Ideal MA = - correct answer ✔✔VR
, Obtains mechanical advantage from force moments created by 2 connected components of different
radius/diameter - correct answer ✔✔Wheel & axle
Wheel and axle VR = - correct answer ✔✔R / r
effort x distance moved by effort = - correct answer ✔✔work in
load x distance moved by load = - correct answer ✔✔work out
efficiency x VR - correct answer ✔✔MA
Simple machine that uses set of pulleys with single rope/chain/cable - correct answer ✔✔Pulley System
Pulley system downward effort VR = - correct answer ✔✔# pulleys
Pulley system upward effort VR = - correct answer ✔✔# pulleys + 1
Screw jack efficiency is considered to be - correct answer ✔✔Low
Produces MA by application of a turning force to a threaded spindle - correct answer ✔✔Screw Jack
Distance from the top of one thread to the bottom of another - correct answer ✔✔Pitch of a screw
thread
Distance the screw moves when it is turned through one complete revolution - correct answer ✔✔Load
For a one start thread, lead = - correct answer ✔✔pitch
For a two start thread, lead = - correct answer ✔✔2 x pitch
