An object does not have a varying speed if its velocity is constant. A constant velocity implies that an object is moving in a straight line at an identical rate over time.
When an object has a constant velocity, it moves an equal distance in an equal direction over equal periods of time. Both speed and direction are unchanging when an object has constant velocity. It is, however, possible to have an item with constant speed change velocity. Speed is the magnitude of an object's velocity; an object can have constant speed but changing direction. According to Zona Land Education, an example of this is when a car goes around a curve at a constant speed; its velocity changes because its direction changes.Learn More
A machine is any device that transmits mechanical energy or power into useful work. The simplest machines redirect an applied force or convert kinetic energy into potential energy. More complicated machines are powered by electricity or fuel and use moving parts and electronic circuitry to complete complex tasks.Full Answer >
When a leaf falls, it is being accelerated by gravity to the ground. It is opposed, however, by air resistance, also known as the drag. The net force on a leaf is calculated by subtracting its weight from its drag.Full Answer >
To calculate the flow rate in a cylindrical pipe, the basic formula, which is flow rate is equivalent to pipe cross-sectional area multiplied by velocity, can be used. Here the area is calculated as pi times pipe diameter squared and divided by four.Full Answer >
An common example of a lever is a see-saw. Some other levers are pliers, crowbars, wheelbarrows, scissors, staplers, fishing rods, tweezers, nut crackers and fishing rods.Full Answer >