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What does a stand for in physics?
In physics, "a" typically stands for acceleration, which represents the rate of change of velocity of an object over time. Acceleration can be positive (speeding up), negative (slowing down), or zero (constant speed).
Examples where velocity is zero but not acceleration?
The earth is in orbit about the sun. It plods along in its orbit at close to 30 kilometers per second. But it is not moving in a straight line, as you know. It is following the curve of its orbital path. Earth's inertia and the gravitational attraction between the sun and the Earth are in equilibrium here, and though its speed is constant, its direction of travel is actually changing from moment to moment. That means its velocity is constantly changing. (Note that the actual speed of earth varies a bit through its orbit, but from moment to moment, the change of speed is miniscule.)Speed is distance (displacement) per unit of time. In this case, we have 30 km/sec for the earth. But when we consider velocity, we find that velocity is speed plus a direction vector. Though the speed of the earth is constant in its orbit, it is constantly changing direction and following its orbital path. Earth has a constant speed in its orbit, but its velocity is constantly changing because the direction it is traveling changes from moment to moment.
What is the velocity of a car?
The velocity of a car is the speed at which it is moving and also the direction in which it is travelling. It might be 55 miles per hour east, or 35 miles per hour southwest, or just about anything else like that.
Which is the total velocity of a projectile at maximum height?
It depends. If the projectile goes straight up and straight down, its velocity will be zero at the top. If the projectile is a baseball about halfway between the pitcher and the bat, its velocity might be 150 km/h.
What is velocit?
Subconsciously driving over the speed limit after leaving an expressway
The EM waves Why change velocity in different mediums?
Electromagnetic waves change velocity in different mediums because the speed of light is determined by the properties of the medium it is traveling through. When light enters a different medium, its speed changes due to interactions with the atoms and molecules in that medium, affecting the wave's propagation. This change in speed is responsible for effects like refraction, where light bends as it passes from one medium to another.
What are the conditions for an object to stay at restto keep moving at constant velocity?
"Constant velocity" means neither the speed nor the direction of the object's motion is changing. "Rest" is just one kind of constant velocity ... the kind with zero speed. The condition for an object's velocity to remain constant is: Either there are no forces acting on the object, or else all of the forces acting on it add up to zero. If there is any NET force acting on the object, then its velocity will change ... it will either speed up, slow down, or curve in a new direction.
How can an objects velocity change?
By changing its direction.
If the speed of a moving object triples then what else increasses by a factor of three or more?
velocity by 3xmomentum by 3xenergy by 9x
Why does your purse fall when you hit the breaks on your car?
Because at normal driving speed, everything in the car is moving at the same velocity. When you hit the brakes, only the car is decelerating. Everything else that is not attached to the car, either by seat belt (such as your body) or other restraining device is still moving at the initial velocity as the car previously was. Thus, the purse flies forward, because its velocity is greater than the car's new velocity.
What does a stand for in physics?
In physics, "a" typically stands for acceleration, which represents the rate of change of velocity of an object over time. Acceleration can be positive (speeding up), negative (slowing down), or zero (constant speed).
Examples where velocity is zero but not acceleration?
The earth is in orbit about the sun. It plods along in its orbit at close to 30 kilometers per second. But it is not moving in a straight line, as you know. It is following the curve of its orbital path. Earth's inertia and the gravitational attraction between the sun and the Earth are in equilibrium here, and though its speed is constant, its direction of travel is actually changing from moment to moment. That means its velocity is constantly changing. (Note that the actual speed of earth varies a bit through its orbit, but from moment to moment, the change of speed is miniscule.)Speed is distance (displacement) per unit of time. In this case, we have 30 km/sec for the earth. But when we consider velocity, we find that velocity is speed plus a direction vector. Though the speed of the earth is constant in its orbit, it is constantly changing direction and following its orbital path. Earth has a constant speed in its orbit, but its velocity is constantly changing because the direction it is traveling changes from moment to moment.
What is the velocity of a car?
The velocity of a car is the speed at which it is moving and also the direction in which it is travelling. It might be 55 miles per hour east, or 35 miles per hour southwest, or just about anything else like that.
How do you find average acceleration of an object?
a = w2r = v2/r where a is acceleration w is angular velocity r is radius of orbit v is velocity.
What is the astronomy definition of linear velocity?
The same as anywhere else. The distance covered in a short time, divided by the time, and you make that time tend to zero to give the linear speed at any instant. Strictly velocity is a vector so besides having magnitude equal to the speed it has a direction, along the tangent if the object is moving in a curve.
Which is the total velocity of a projectile at maximum height?
It depends. If the projectile goes straight up and straight down, its velocity will be zero at the top. If the projectile is a baseball about halfway between the pitcher and the bat, its velocity might be 150 km/h.
What is velocit?
Subconsciously driving over the speed limit after leaving an expressway
