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Why do you consider a moving object to accelerate even when it slows down or chnges direction without changing speeed?
Wiki User
∙ 13y ago
Because that's the definition of "accelerate".
"Accelerate" doesn't mean "speed up", although that's how everybody who
rides in a car uses the word.
"Accelerate" means "change the speed or the direction of motion, or both".
Wiki User
∙ 13y ago
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When an object accelerate what can it do?
When an object accelerates it can change its speed or direction of motion. When it accelerates without changing its direction of motion, it can cover any distance in less time.
Is changing direction really the same as changing speed?
No. It is possible to change direction without changing speed. However, it is not possible to change direction without changing velocity.
How can velocity change without changing the speed?
Consider velocity as consisting of a speed, and a direction. If any of the two changes - that is, if either the speed or the direction changes - then the velocity changes.
Can reflection of light happen without changing the direction of light?
No, reflection means that the direction of light is changed.
Can refraction of light happen without changing the direction of light?
no. Energy is conserved.
Can a body accelerate without speeding up or slowing down?
Yes. Acceleration does NOT mean 'speeding up', or even 'slowing down'.'Acceleration' means any change in the speed or the direction of motion. Soif you take a curve at constant speed, there is acceleration present while yourdirection is changing around the curve.An object in a closed curved path ... like a race car in a circular or oval track, or a planetor moon in a closed curved orbit ... is ALWAYS accelerating, even if its speed never changes,because its direction is constantly changing.
A cyclist goes around a level circular track at constant speed. Is the cyclist's acceleration zero because her speed is constant?
No. The cyclist is moving at a constant speed, but her velocity is changing. Remember that velocity is speed with a direction vector associated with it. As speed is constant, only direction is changing. But a change in direction is a change in velocity (even if speed is constant), and this requires acceleration in that direction to accomplish the change in direction. You're on the right track, but just recall that acceleration is tied to velocity and not just speed. And note that velocity can change all the time without speed changing. Acceleration must cause the change in velocity. Consider that objects in orbit around the earth move at a pretty constant speed, but accelerate toward the earth all the time. Their speed coupled with their acceleration toward earth cause them to move in an arc - which is their orbital path.
How can you change only one component of the velocity without changing the speed?
Reverse the direction of the component.
An unbalanced force to the left accelerates an object in what direction?
The application of force on object (without opposing forces) results in acceleration in the direction of the vector. In this case the unbalanced force to the left will accelerate the object to the right.
Which machine changes the direction of force needed to do a task without changing the size of the force needed?
A pulley can do that.
Which machine changes the direction of force needed to do a task without changing the size of force needed?
A pulley can do that.
Which machine changes the direction of force needed to do a task without changing the size or force needed?
A pulley can do that.
