• How do rides create the illusion of increase or decreased weight?
that happen es because of the acceleration: If the train (roller coaster e.g.) moves up suddenly, the bodies weight is pushed into the seat giving you the sensation of being heavier, when it moves down on top of the hill the body is accelerated into the bar making you think you are lighter.
Trig: The formula for the up and down motion of a weight on a spring is given by s=sin(√k/m)t?
Then, we have... 2π * √(m/k) = 6 √(m/k) = 3/π m/k = 9/π² m/3 = 9/π² m = 27/π² The answer choice is C. Good luck!
I have a Q.Does motion create more gravity.?
Believe it or not, your question has two answers -- 1. If we consider RELATIVISTIC mass, the answer is yes. In Special and General Relativity, the observed mass of an object moving **with respect to an observer not moving at the same velocity** increases with velocity. 2. Just plain old mass, like a steel ball, will not experience a mass increase with an increase in velocity **as measured by an observer with the same velocity**. An increase in relativistic mass does *not* cause an increase in gravity.
How do rides create the illusion of increased or decreased weight?
"rides" involve acceleration throughout their motion. this acceleration can be upwards or downwards depending on what ride we are talking above. if you are sitting in a seat that is accelerating in the direction that you are moving in, you are pressed backwards against the seat. this makes your brain interpret the effect as you feeling heavier. if the acceleration is upwards, it is opposing gravity, making you interpret this as being "lighter". cheers
Does the earth's motion influence gravity?
The equation for the gravitational force of the earth on a given body is [math]F_g=G\frac{m_em_b}{r^2} [/math]where [math]r [/math]is the distance between the center of the earth and the center of mass of the object in question. There is no term in that equation for the rotation of the earth, so the rotation of the earth does not affect the gravitational force that the earth exerts on other bodies.But wait!The rotation of the earth does affect your weight. Because the earth is spinning so fast, apparent wight at the equator is less than the apparent weight at the poles. If you are standing at the equator while the earth spins around, you are undergoing uniform circular motion. That means that as your inertial mass tries to keep you moving in a straight path, the force due to gravity causes your velocity to change direction and follow a circular path.As a result of your inertia attempting to carry you in a straight line, the normal force that the earth exerts on you is alleviated slightly. Since the normal force is what determines how much weight you feel, your weight is lessened.To delve even further, look at the shape of the Earth. Over billions of years, the Earth’s rotation has caused it to become an ellipsoid rather than a sphere. That means that it has flattened out slightly. At the equator, you are farther from the center of the planet than you would be if you stood at a pole. The gravitational force decreases proportional to [math]r^2[/math], so it will be less at the equator.In short, if you ever need to drop a few pounds, just move to the equator and you’ll be fine.
To lift an object, is an upwards force greater than the object's weight needed or a force equal to the objects weight required?
To hold the weight or move it at constant speed, only the force corresponding to the weight need to be applied but if the mass is to be accelerated then the force is to be modify according to F= m*a, also if the movement is being dragged against a surface that force is to be added F= V* friction coef,
Why can't a perpetual motion machine work by placing weight on a lever and harness gravity to be the displacement needed to generate power?
The idea of harnessing gravity is not new.A weight attached to a lever would be one way. But it would have finite travel and even if put on the lever by a magical being, once it did its work it would have to be reset and would thus not be perpetual motion. Given friction, it wouldn’t even be 100% efficient the first time.Hydro power generation might seem like perpetual motion but it is not because the sun’s energy causes water from lakes, rivers, and oceans to evaporate and rise; and the vapor then condenses and falls as rain and snow, some of it at high elevations, and that water is collected, often in dams, and then converted from hydro to electricity. It seems to go on but it has an external driver—the sun—and is therefore not perpetual motion.Conceivably there are gross exceptions to the laws of thermodynamics universe wide.But it does not seem to be a practical proposition on Earth.The first law rules out perpetual motion as a source of eternal energy.The second law implies that energy conversion in a cyclic pattern cannot be 100% efficient, even without friction, and so rules out just plain perpetual motion.Things are different on an atomic level. But the laws of thermodynamics are about the macroscopic level. People, e.g. James Clerk Maxwell, also of electromagnetic field equation fame, have thought of schemes working at the atomic level to overcome perpetual motion difficulties. The consensus is that these will not work.