Asked by Carl Buster
If you were standing in a bus moving at a constant velocity would you have to lean and a special way to compensate for the bus motion?
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Asked in Physics, Newtons Laws of Motion
If you were standing in an enclosed car moving at constant velocity would you have to lean in some special way to compensate for the car's motion?
Asked in Science
What is the formula for acceleration?
a=dv/dt. By definition, acceleration is the rate of change of velocity. In mathematical notation, it is given as the formula stated above. Two special cases: 1. When acceleration is constant: The rate of change is a constant. Therefore, it can be calculated by: a=(vf - vi) / t where a is acceleration vf is final velocity vi is initial velocity and t is time taken 2. When velocity is constant: Velocity is not changing. The rate of change of velocity is zero. Acceleration has to be zero. * * * * * Note that velocity and acceleration are both VECTORS. Therefore, an object going round in a circle, at CONSTANT speed, has velocity and acceleration that are changing all the time - because the direction of motion is changing.
Asked in Physics
Cart is rolling down a special ramp where there is no friction at all What will happen if the amount of mass on the cart is increased?
Asked in Ford Escort, Ford Escort LX, Ford Escort ZX2
What are the replaceable parts on an axle from a 95 ford escort?
Asked in Albert Einstein
What is Albert Einstein's special theory of relativity?
The special theory of relativity was proposed in 1905 by Albert Einstein and states that: 1. The speed of light is a constant, and 2. All of the laws of physics are applicable within any given inertial reference frame. Special relativity deals with relative motion at a constant velocity, as opposed to General relativity. An inertial reference frame is formed by a group of objects traveling together at a constant velocity. For example: If you were in a car moving at a constant 60mph with no bumps in the road to disrupt you, you could throw a ball, perform experiments, and do virtually anything as though you weren't moving at all. Because of the speed of light being constant for all inertial reference frames, however, special relativity also implies that the faster an object moves, the slower time becomes for that object. Because of this, the theory of relativity is essential for determining speeds, distances and time at very high velocities.
Asked in Firearms, Smith and Wesson
What is the difference in SW 38 special and 38 special P?
Asked in Physics, Chemistry, Miley Cyrus
If a crate is stationary on an incline does it mean that it is in the state of equilibrium?
If a crate placed on an inclined plane is moving at constant velocity or not moving at all -- which is really a special case of constant velocity where the velocity is zero -- then the sum of the forces acting upon it is zero. We can say that it is in a state of equilibrium, where all forces acting upon it are in perfect balance and cancel themselves out. A free-body diagram is often used to represent a body and the forces acting upon it and helps us visualize the relationship of the vector forces. See this link: http://en.wikipedia.org/wiki/Free-body_diagram#Example
Asked in Physics
What is the equation for convertin speed to velocity?
Asked in Units of Measure
What is the metric standard unit of measurement for speed and velocity?
Asked in Physics, Albert Einstein, Speed of Light
What does special relativity say about the speed of light?
Asked in Care of Horses
How does a horse lock there knees to sleep standing?
Asked in Physics
What is velocity quantity?
The average speed of an object is defined as the distance traveled divided by the time elapsed. Velocity is a vector quantity, and average velocity can be defined as the displacement divided by the time. For the special case of straight line motion in the x direction, the average velocity takes the form:
Asked in Physics
What is relativistic velocity?
Motion with constant velocity is a special case of motion with constant acceleration?
Motion with constant velocity is motion without acceleration. That is, there is no force being applied to the object in motion. One could argue that the acceleration is constant in that case, but the constant value is zero. Now, general relativity tells us that gravity and acceleration are indistinguishable from each other for a point mass being affected by either (meaning that if you're accelerating, you cannot tell just by the effect of the force whether it's due to an actual force, F=ma, or another massive object causing gravitational attraction). So in some ways, one could argue that the force of gravity is identical to constant acceleration. The difference is that gravity is caused by the presence of mass which "warps" space-time, so the acceleration felt is actually caused not by a force acting directly on the object, but the object is moving at a "constant velocity" in the equivalent flat (non-warped) space-time, and due to the presence of another mass causing a gravitational attraction, acceleration is felt. Think of it as standing on the center of a mattress. Your weight causes the middle of the mattress to push down, and if you had something like a basketball sitting in the corner of the mattress, it would begin rolling toward you. In that example, the mattress is space-time, the basketball the body in motion, and you the mass causing gravitational attraction. In that sense, since the object would be moving at a constant velocity in a flat space-time (like the ball sitting still on the mattress), warping space-time does not apply a true force to the ball, the causes it to appear to accelerate nonetheless. This appearance is due not to a force acting directly on the ball, but acting on the space-time in which it inhabits.
Asked in Physics
If a baseball has zero velocity at some instant is the acceleration of the baseball necessarily zero at that instant explain and give examples?
oh my... The acceleration is the first derivative of the speed / velocity. Mathematically the first derivative of a constant function is null. By the way, the acceleration is null regardless of the actual speed, provided this speed is not changing (null is a only special case of a constant). The notion of derivative is linked to the notion of values at limits, so when we say the speed is constant, actually we want to say the difference in speed in this very infinitesimal period of time we are interested in was zip, and the derivative of zip is null. Examples? Well there is no example on earth where you accelerate while not moving.
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