A doorknob is considered a wheel and axle because it has a wheel portion, the knob, and an axle, the rod in the door, that turn on the same axis. In instances such as a doorknob, a wheel and axle can also be considered a type of lever.Continue Reading
One common conception of a wheel and axle is as a tool to reduce surface friction to easily roll an object from one place to another. This is the type of wheel-and-axle system used in cars and bicycles. Under this configuration, a force is applied to the object, and the comparatively reduced surface area of the wheel as well as the wheel's size compared to the axle make the object easier to move. A larger wheel generally makes an object easier to roll.
The wheel and axle can be used as a type of lever. A force applied to the outer rim of a wheel creates greater torque on the axle than the same force applied to an axle without a wheel. This is because the wheel functions as a lever to create a mechanical advantage. The larger the wheel, the larger the mechanical advantage, and the easier it is to turn the axle. This is the type of wheel-and-axle system that a doorknob creates.Learn more about Building Materials
To fix a door that doesn't latch, tighten any loose screws on the hinges, latch and strike plate; loosen the door knob; and lubricate the latch. If needed, realign the strike plate with the latch by filing the plate with a metal file.Full Answer >
Some tips for repairing door locks at home include making sure the door's latch bolt lines up with the doorjamb's strike plate, tightening the doorknob by loosening the setscrew on the knob’s shank and turning the loose knob clockwise, and using a bottle of lock de-icer to lubricate slow-working locks. Fortunately, these actions can all be performed fairly easily without professional help.Full Answer >
A shower curtain tension rod works by an internal spring forcing the ends of the rod against the walls it's placed between. To install a shower curtain tension rod, the rod must be adjusted to a size roughly an inch longer than the space it's going to occupy. Once the tension rod is properly adjusted, it can be compressed long enough to put up, then released to stay secure.Full Answer >
Common problems with the Cadillac STS include turn signal failures, electrical system issues, leaks in the rear axle pinion seal, air bag issues and problems with the check engine light. The Cadillac STS was a midsize luxury sedan manufactured by Cadillac between 1998 and 2012. The greatest number of problems occurred when the STS model was separated from the Cadillac Seville in 2005.Full Answer >