As the hang glider and pilot move through the air, they collide with air molecules. The frictional force caused by these collisions is known as drag, which slows the glider down. The amount of drag is proportional to the airspeed of the hang glider: The faster the glider moves, the more...
Forces are vectors, which means that have a magnitude and a direction the force is acting. The unit for force is the newton and is abbreviated N. Newton's second law shows how the sum of all forces on an object equals the mass times the acceleration of the object....
How to find tension on an inclined plane At what rate would a 20 kg box accelerate if it were pulled to the right with a 100 N tension at a 40° angle, in m/s^2? Why is the tension force equal to mass x gravity on an inclined plane?
How does the funny "H" pattern that I am moving this stick shift knob through have any relation to the gears inside the transmission? What is moving inside the transmission when I move the shifter? When I mess up and hear that horrible grinding sound, what is actually grinding? What ...
Manual transmissions in modern passenger cars use synchronizers, or synchros, to eliminate the need for double-clutching. A synchro's purpose is to allow the collar and the gear to make frictional contact before the dog teeth make contact. This lets the collar and the gear synchronize their spe...
The direction of the [dry, kinetic] frictional force on an object is opposite the direction of the object's *relative* motion, with respect to whatever object that it is sliding against. The frictional force is always in a direction such that the force tries to stop/reduce the object fr...
The second force will force some parts of the plate to spin faster than some others. if the plate is not horizontal. This is because an object on a higher altitude has a large dynamic energy than an object on a lower altitude. Since, you are rotating it at a constant angular velocity...
Torques do not have to act at right angles to levers, though for any given applied force, a right (that is, 90°) angle yields the maximum amount of force because, to simply the matter somewhat, sin 90° = 1. For an object to be in equilibrium, the sums of the forces and the to...
example, if you're moving off from a cold start, or a traffic signal, you need the engine to produce a great deal of force (torque as it's called) at a relatively low speed, whereas if you're driving steadily on a speedy highway, you'll need the opposite: more speed and less ...
It's why rollercoaster rides must always come to an end sooner or later. The cars simply run out of energy.Artwork: How energy and forces change during a rollercoaster ride. To learn more about centripetal force—the force that makes things go around in a circle—please take a look at ...