The mechanical advantage of a compound machine is determined by __________________.
adding the mechanical advantage for each simple machine
finding the simple machine with the largest mechanical advantage
finding the average mechanical advantage for the simple machines
multiplying the mechanical advantage for each simple machine
A simple machine that is actually a kind of inclined plane .
Pulley
Wedge
Gear
Balance
Find the mechanical advantage of the screw jack having a pitch of 34.0mm and a handle radius of 52.0cm
960
0.411
96 .0
411
The algebraic sum of the moments of force about any point in that plane is equal to _________.
1
100
zero
180
Two boys are carrying a load of 900N on a stick between them. The length of the stick from the load to one end is 2m and the length from the load to the other end is 3m. Calculate what part of the load each boy carries.
600N and 300N
360N and 600N
540N and 600N
540N and 360N
A person weighing 800 N moves an object with a simple machine using all his weight. The mechanical advantage of the machine is MA = 5. Determine the mass of the object.
408 kg
400kg
4000 kg
805kg
A steering wheel has a radius of 18cm and an axle of radius 0.787cm. How much force is required to turn the wheel if a resistance force of 88.5 N is present?
558N
2.03N
3.87N
2020N
The ratio of the work output to the work input is ______________.
mechanical advantage
efficiency
work
power
When a person opens a door, he applies
Force
Torque
Moment
None of the above
An automotive engineer realizes it will be difficult for drivers to turn a pick up truck with a steering wheel that has a radius of only 11.0 cm . What can the engineer do to increase the mechanical advantage of the steering wheel?
shorten the axle length of the steering wheel
decrease the radius of the steering wheel
lengthen the axle length of steering wheel
increase the radius of the steering wheel
