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Acceleration
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Vectors are always expressed fully by use of a magnitude and a direction. ... . TRUE - Accelerating object MUST be changing their velocity -either the magnitude ... |
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Acceleration occurs when there is a net force on an object; ... . as the force of gravity, but that is not always true, and it is not true in this case. |
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To make that happen, the object's centripetal acceleration is always directed toward the center of the circle, perpendicular to the object's velocity at any one time. |
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Is it true that if the velocity is zero at an instant, the acceleration...
Reason: Acceleration is defined as rate of change of velocity at any instant. ... If the velocity of an object is zero at some point, then it's acceleration must also be zero ... would never change and will always remain zero, which is clearly not true. |
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newtonian mechanics - How can an object with zero acceleration...
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Which of the following must always be true? I. If an object's acceleration ... If an object's acceleration is zero, then its speed must remain constant. III. If an object's ... |