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What can have positive or negative value depending on the direction of the change in position?
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How can there be a negative position but a positive velocity?
Well let's see. If you define sea-level as zero elevation, and the upward direction as positive, then a submarine that's in the process of rising to the surface has a negative position and positive velocity. If I spent a while at it, I guess I could think of about 17 other examples, and I'll bet you could too.
Can momentum have a negative velocity?
No, momentum can not have a negative velocity. Velocity is the rate of motion of a body from one position to another position in a particular direction. Bodies traveling in opposite directions may appear to have a negative velocity in relationship to each other but any amount of velocity is positive.
Why can velocity be negative but nonzero speed is always positive?
speed is a scalar quantity with magnitude only but no direction; velocity is a vector with both magnitude (speed) AND direction, which could be positive or negative
How voltage become zero in centre point?
If you have an alternating current, which changes direction, and we graph the direction in terms of positive and negative, then at some point, as the current changes from positive to negative, and from negative to positive, it must pass through zero. If you imagine a car, driving forwards, that then changes direction and drives in reverse, there must be a point when it is not moving. Changes of direction, or voltage, are not instantaneous.
Is retardation positive or negative acceleration?
Retardation or deceleration is negative acceleration. It is opposite to the direction of velocity.
How can friction be positive and negative?
Friction can be negative or positive depending on the direction in which your measures are positive.
Is the sum of a position and a negative number always position?
Not necessarily; a positive number plus a negative number will be a positive number if the positive number is greater. Example: 10 + (-6) = 4
Why rotor of a dc motor moves in the anticlockwise direction?
Positive and negative are reversed. It will run either direction depending on which way it is wired.
Can a position time graph tell in which directionthe displacement of an object is?
Yes. If the slope is positive, the direction of the displacement is positive (e.g. north, east, or right). If the slope is negative, the direction of the displacement is negative (e.g. south, west, or left).
When acceleration upward or downward direction is taken positivw or negative?
If it is gravitational acceleration then it it is positive in downward and negative in upward direction..if it is not gravitational acceleration then it is depending upon the value of acceleration.
Is a net loss a negative or a positive?
You can consider any direction as positive, and the opposite direction as negative. However, in this case it is customary to call a gain "positive", and a loss "negative".
Is voltage negative or positive?
A negative or positive sign is applied to a current depending upon the direction in which it is moving, and in the case of alternating current, that direction changes 60 times per second. Viewed strictly as a form of energy, voltage is always positive. So far, physics has not detected negative energy.
Can there be a positive acceleration and a negative acceleration?
Yes, acceleration can be positive and negative because acceleration is a vector. It has both direction and magnitude. The direction is what makes it positive or negative. Negative acceleration is usually called deceleration.
How can there be a negative position but a positive velocity?
Well let's see. If you define sea-level as zero elevation, and the upward direction as positive, then a submarine that's in the process of rising to the surface has a negative position and positive velocity. If I spent a while at it, I guess I could think of about 17 other examples, and I'll bet you could too.
When you add a positive and a negative what does it become?
the answer could be negative or positive depending on whether the negative number you're adding is bigger than the positive number
What type blood does O negative and A positive make?
they can have a A positive A negative O positive O negative depending on genes of A
Is the direction of current through a battery always from negative to positive on the terminals?
Conventional current flow is from positive to negative. Electron flow is from negative to positive
