Designing a Door

Torque has to be taken into account in the design and creation of a door. Because the torque of a force is greater when it is applied along a larger distance from the axis of rotation (and therefore the force is more effective) door knobs are placed on the side opposite the door hinges.

Torque, Clarified

It is important to note that torque is not always determined by the total force applied on an object. Instead, it is only the force that is perpendicular to the lever arm that is taken into account in the calculation.

Torque (cont)

The torque of a force is found using this simple formula:
T = Fd, which means that the torque equals the distance from the axis of rotation to the place where the force is applied (d) multiplied by the magnitude of the force (F). Maximizing the torque of a force has many real-world benefits, so being able to calculate it is beneficial.

Intro to Torque

Torque is a rotational force. It is, in a way, a measure of the force causing an object to rotate around a fixed axis.

Earth's Gravitational Pull

In addition to cannonizing his three laws of motion, Newton also created the Law of Universal Gravitation, which makes it possible to determine the force of gravity between two bodies, such as the Earth and the moon.

Buoyancy

 Buoyancy is the "tendency of a body to float or to rise when submerged in a fluid," (Merriam-Webster). This phenomenon is the result of the increasing pressure of fluids at increasing depths. According to Pascal's Principle, this pressure applies in all directions; therefore, the pressure on the bottom of glass balls pictured is larger than that applied by air on the top of the balls, causing a net upward force on them.

Converging Lines

In looking at this picture, the lines which mark the edges of the hallway appear to converge in the distance; however, this is clearly not the case in actuality. This phenomenon occurs as a result of the linear perspective, a cue of the eye which allows human beings to perceive depth. This cue is related to relative size (how close objects are to an object of known size) and texture gradient(closer objects automatically appear larger). All of these enhance the experience of seeing and allow us to better perceive the nature of our environment. Additionally, artists utilize this knowledge of linear convergence in adding perspective to their paintings and drawings.