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Can the direction of the velocity of an object change keeping the acceleration constant?
Wiki User
∙ 11y ago
In order to change the direction of the velocity, acceleration is absolutely required.
And as long as you've got it, there's no reason why it can't be constant.
An object moving in a circle at a constant speed ... like a TV satellite ... has constant
acceleration, and the direction of its velocity is constantly changing.
Wiki User
∙ 11y ago
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How can a car accelerate if its speed is constant?
It can Accelerate by changing it direction as acceleration eing a vector is dependant on the direction so by changing its direction one can accelrate it keeping the speed constant.
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.
Why is a train that is traveling on a curved track at a constant speed accelerating?
We all grew up thinking "acceleration" means "speeding up". It doesn't."Acceleration" means the speed or the direction is changing.So if a moving object is speeding up, slowing down, or keeping a constant speedon a path that's curving or bending, then there's acceleration going on.
What is best to say about a runner that is running at a constant velocity?
The best thing to say about a runner that is running at a constant velocity is simple. They are really keeping up the good work.
What would cause an object to have smaller acceleration?
increasing the mass of the object, keeping the net force constant
Can the direction of velocity of an object change keeping the acceleration constant?
Yes. dv/dt = a=constant.
When can an object a constant speed but not a constant velocity?
If the velocity is constant there is no acceleration. Speed is not velocity, velocity has speed and direction. I A car going around a circular track at 60 mph keeps the same speed but changes direction and thus accelerates at a constant speed. Velocity is speed in a certain direction. So change the speed but keep direction the same and you change the velocity. or Change the direction while keeping the speed the same and you change the velocity. If the speed is constant, any change of direction is a change in velocity. Driving around in a circle is a case of constantly changing direction.
How can a car accelerate if its speed is constant?
It can Accelerate by changing it direction as acceleration eing a vector is dependant on the direction so by changing its direction one can accelrate it keeping the speed constant.
Can a body moving with uniform speed have variable velocity?
Yes it can.When a body moves in a circular path keeping its speed uniform then it will have variable vilocity as vilocity is the speed in a particular direction and while moving in a circular path its direction keeps changing and so does vilocity
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.
Why is a train that is traveling on a curved track at a constant speed accelerating?
We all grew up thinking "acceleration" means "speeding up". It doesn't."Acceleration" means the speed or the direction is changing.So if a moving object is speeding up, slowing down, or keeping a constant speedon a path that's curving or bending, then there's acceleration going on.
What is best to say about a runner that is running at a constant velocity?
The best thing to say about a runner that is running at a constant velocity is simple. They are really keeping up the good work.
Newton's second law for rotational motion?
I am not sure whether Newton actually stated this law... It's more like an analogy, or equivalent. It is still valid, though. Newton's Second Law for linear movement: force = mass x acceleration. The equivalent for rotational movement: torque = (moment of inertia) x (angular acceleration). Keeping it simple: acceleration = change in velocity/time for change. Velocity is a vector having both size and direction, thus any change in direction changes velocity. Not its magnitude, just its direction. A change in velocity with time means the object is accelerating. To do this a force must be applied perpendicular to the direction of the velocity vector to pull the object round into a circle. F=ma applies, therefore.
What would cause an object to have smaller acceleration?
increasing the mass of the object, keeping the net force constant
How can you double the frequency of a wave if you have control over both the wavelength and the wave velocity?
You can either halve the wavelength, keeping the wave speed constant; or double the wave speed, keeping the wavelength constant.
If I had a mass on a string and rotated it at constant velocity how would its velocity change if the string snapped?
I believe you meant that you had an object on a string that revolved around an axis at a constant velocity. If that is the case, under friction free conditions, when the string snaps, it's velocity would not change, only its direction of movement. The centripetal force that was keeping the mass revolving around the axis would converted into centrifugal force that would make it travel in a straight line away from the axis.
If the frequency is doubled then for waves what would be the wavelength and vlocity?
Frequency = Velocity divided by wavelength. So if frequency is doubled that means velocity is doubled but the wavelength is halved. You can see this by keeping wavelength a constant : If Frequency =1 and Wavelength= 1 1= Velocity/1 Velocity=1 If Frequency =2 and Wavelength= 1 2= Velocity/1 Velocity =2 OR keeping Velocity constant: If Frequency =1 and Velocity= 1 1= 1/Wavelength Wavelength =1 If Frequency =2 and Velocity= 1 2= 1/Wavelength Wavelength=1/2
