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Answered 2012-06-07 19:19:48
Yes you are absolutely right.. the acceleration of an object is how quickly
it's velocity changes AND the direction in which it changes.
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Acceleration is how quickly an objects velocity changes?
Yes, acceleration is the how the velocity changes. This also includes when an object turns
How can you describe changes in velocity?
This is usually described by the term "acceleration" - which is really the rate of change of velocity (how quickly velocity changes); in symbols: a = dv/dt.
What is it called when an object changes velocity?
That's simply called a change in velocity. On the other hand, the rate of change in velocity - how quickly velocity changes - is called acceleration.
When an object is accelerating if its?
An object accelerates if its velocity changes. More precisely, "acceleration" is the rate of change of velocity (how quickly velocity changes), or in symbols, dv/dt.
Does acceleration always mean that an object is speeding up?
No. As used in physics, the word "acceleration" means that THE VELOCITY CHANGES. More precisely, it refers to how quickly the velocity changes, in symbols, dv/dt.
How do speed and velocity relate to acceleration?
Acceleration refers to the rate of change of velocity - how quickly velocity changes. In symbols: dv/dt. When the velocity changes, the speed may, or may not, change. For example, if an object moves in a circle at a uniform speed, its velocity is changing, but its speed is not.
Give 5 examples of law of acceleration?
I am not aware of any law with that name. "Acceleration" refers to the rate of change of velocity - how quickly velocity changes. In symbols: a = dv/dt
Why do you had to calculate acceleration with velocity?
Because acceleration is the rate of change of velocity: it is a measure of how quickly velocity is changing.
What is the change in velocity of the motion of an object i?
The change in velocity is just the change in velocity. The RATE of change of velocity - how quickly velocity changes - is usually called "acceleration".
What best describes the difference between speed and acceleration?
This can better be stated in terms of VELOCITY and acceleration. Acceleration is the rate of change of velocity, i.e., how quickly it changes - in symbols: a = dv/dt.
Why is the velocity 0 when your speed is constant?
It's not. If you speed is constant (but not zero), then your velocity won't be zero, either.You may be confusing this with the following: If your VELOCITY (not your speed) is constant, then your ACCELERATION is zero. Acceleration refers to how quickly velocity changes, so if velocity doesn't change at all, acceleration is zero.
What is acceletation?
If you mean "acceleration", that is the rate of change of velocity - how quickly velocity changes. For example, if an object falls down without air resistance, close to Earth's surface, its speed will increase by 9.8 meters per second every second. This is commonly written as 9.8 meters/second2 - and this rate of change of velocity is called "acceleration".
What quantity describes how quickly you change your speed?
The quantity that describes how quickly you change your speed is called acceleration. It's usually measured in m/s2 or (m/s)/s. Another definition for acceleration is rate of change of velocity.
If an object has greater speed does it necessarily have a greater acceleration?
No, acceleration is the rate of increase or decrease in the velocity of an object. An object at high velocity will have zero acceleration if its velocity is not changing. A slow moving object will have high acceleration if its velocity is changing quickly. Answer: The above is correct, but if you have... say a fast moving object in the earth's atmosphere, like a space shuttle entering the earth atmosphere, the faster it goes, the more force will be applied to it to slow it down by the air it has to pass through. So, its possible, that, if you give something a large velocity, like a base ball for example, it will be subject to larger resistance to motion force, which is proportional to the velocity squared and will consequently accelerate more in the opposite direction of motion.It is very important not to get velocity and acceleration mixed up though. Velocity is the rate of change of displacement; acceleration is the rate of change of velocity. Simply having a high velocity in the absence of an atmosphere will not cause a greater acceleration by itself.
Why do things fall quickly?
Acceleration due to gravity, -9.81 m/s^2, is just like any acceleration. As time continues, a moving objects speed increases.
Can an object have zero acceleration and non-zero velocity at the same time?
Yes. Consider a skydiver in freefall. Fairly quickly the skydiver will reach terminal velocity (the speed at which their acceleration from gravity is cancelled out by the resistance of the air through which they are falling). At terminal velocity the skydiver has non-zero velocity (about 56m/s or 200km/h) but zero acceleration (because their velocity is not increasing). In a vacuum, where there is no air resistance, there is also no terminal velocity. Because there is no force acting against acceleration an object will continue to accelerate provided its source of acceleration continues to be applied. It is worth noting that an object cannot use this rule to exceed the speed of light because as the speed of light is approached the relative time for the object slows. On earth, however, or indeed in any similar environment, an object can certainly have zero acceleration and non-zero velocity.
The rate at which an objects velocity changes with time is called?
It is acceleration. Recall the accelerator hold in case of two wheeler and accelerator pedal in case of four wheeler. After the engine is started then we turn the throttle and vehicle starts moving from rest and soon the velocity goes on increasing. The more we turn in case of two wheeler and the more we press the pedal in case of four wheeler, the speed gets increased so quickly. So 'rate of' phrase is used to mean any change with respect to time or change happening in one second. Rate of displacement is velocity Rate of change in velocity is acceleration Rate of doing work is power Rate of flow of charge is electric current.
What are the differences between acceleration speed and velocity?
Acceleration is the change in velocity. That is, if you're going faster, you're accelerating in the positive direction. If you're going slower, you're accelerating in the negative direction, or decelerating. Velocity is the change in position. Measured in meters/second most of the time, it describes how quickly you are moving and in what direction. Speed is the absolute value of velocity. Unlike velocity and acceleration, speed is a scalar, not a vector (which means it has an amount, but no direction). If you're moving backwards at 2 m/s, your velocity is -2 m/s, but your speed is still just 2 m/s.
What is a situation when you might travel at a high velocity but with a low acceleration?
"Acceleration" simply means how quickly velocity changes. Thus, such a situation could arise, for example, whenever you are riding in a car - most of the time the car won't be accelerating. If that isn't fast enough for you, in airplane travel the situation is similar. The Earth's movement around the Sun - at about 30 km/second - is even faster, and the velocity doesn't change quickly. In this case, it takes half a year, to change from 30 km/second in one direction, to moving at 30 km/second in the opposite direction. Since the orbit is almost circular, you can calculate the actual acceleration as speed squared / radius (where the radius is the distance from Earth to Sun in this case). The result of the calculation, in this case, is about 6 mm/second squared - a tiny fraction of Earth's gravitational field, for example.
What is the velocity of a wave?
How quickly the wave travels
What is a rate of change?
"Rate of change" means how quickly something changes. Examples in physics include a speed as a rate of change of position - if your position changes 10 meters every second, then that (10 meters/second) is your rate of change of position, or your velocity. Or if your income increases by a thousand dollars a year, then that's the rate of change of your income - how quickly your income changes.
How is a change in speed related to force and mass?
Force equals mass times acceleration. To change a speed, you must apply some force (either positive or negative) to give the object some acceleration. How quickly the object's speed changes will correspond to the force given divided by the mass of the object. (ie, the acceleration)
Why could you not slide very quickly on a slide cover with sandpaper?
Sandpaper is designed to be a high-friction material. High friction on a slide means less downward force, which means less acceleration and less velocity.
Can speed and velocity be unequal in a body?
Speed and velocity cannot be unequal for the same object. Speed tells you how quickly something is moving (as measured, for example, in meters per second) and velocity tells you how quickly something is moving and in what direction it is moving.
Mass wasting changes the surface of the earth quickly True or False?
mass wasting changes the surface of the earth quickly
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