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.
The air resistance on a leaf is dependent on several physical factors of the leaf: area, mass and drag coefficient. Area is the size of the leaf. Mass is the weight of the leaf. Drag coefficient is calculated by the overall shape of the leaf as well as by its density and several other measurable factors. The fact that a leaf possesses a large area for its low mass means that it has a high drag factor and a relatively low downward speed.Learn More
Newton's First Law of Motion defines the concept of inertia. The law states that an object will remain in its original state of motion until acted upon by an outside force.Full Answer >
The ramp, wedge and screw are simple machines belonging to the inclined plane family. Inclined planes makes it easier to move an object. Lifting an object vertically requires a great amount of force. Using a ramp requires less force, but also requires the object to be moved a greater distance.Full Answer >
For a rigid body to be in static equilibrium, without total acceleration, two conditions must be met. First, the vector sum of all forces acting on it must be zero (translational equilibrium). Second, the sum off all torques due to any external force on any axis must be zero (rotational equilibrium).Full Answer >
The force responsible for causing air movement is known as pressure gradient force. To display wind speeds, the pressure gradient is plotted onto a weather map using isobars that are mapped between areas of low and high pressure.Full Answer >