Decrease in the slant of an inclined plane increases its _______________.
effort force
mechanical advantage
power
work output
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
What is a simple machine?
Tool that gives electricity to other machines
A machine that does only one job
Any tool that makes work easier
A machine that is made up of many smaller parts
Consider the 18-speed bicycle with 21cm cranks and 45cm wheels. If the sprockets at the crank and the rear drive wheel are the same size, then calculate the ratio of the output force on the tire to the input force on the on the pedal.
2.14
0.47
8.4
38.57
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
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
The distance between two consecutive threads of a screw is called _____________.
pitch
couple
gear
torque
A couple is acting in _____________.
opening the lid of cool drink bottle.
opening the lid of a tin
opening the door
opening the screw cap of a bottle.
Which of the following is not considered as a simple machine.
Wedge
Pulley
Wheel barrow
Lever
A _____________ is a pair of equal, unlike, parallel, forces which acting on a rigid body at different points produce a turning effect in the same direction.
moment of force
gears