define acceleration and give its SI unit.when is acceleration of a body negative?give two examples of situations in which acceleration of a body is negative.
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Acceleration can be defined as the rate of change of velocity.. It is a vector quantity ..Its SI unit is meter/second^2.
When the velocity of an object decreases,then the object is said to be moving with negative acceleration..
An example of negative acceleration would be a car breaking or decelerating.
A ball thrown vertically upwards is moving with a negative acceleration as the velocity decreases with time..
When the velocity of an object decreases,then the object is said to be moving with negative acceleration..
An example of negative acceleration would be a car breaking or decelerating.
A ball thrown vertically upwards is moving with a negative acceleration as the velocity decreases with time..
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Answer:
Acceleration is the rate of change in velocity and its SI unit is m/s².
Explanation:
Acceleration is the rate of change in velocity. It is a vector quantity having magnitude as well as direction. Its SI unit is m/s².
The object is said to be moving with negative acceleration when the velocity of an object decreases with respect to time.
Examples of negative acceleration would be a car breaking or decelerating a car and when a ball is thrown vertically upwards, as the velocity decreases with time, it shows a negative acceleration.
Hence, it can be concluded that acceleration is the rate of change in velocity and its SI unit is m/s², and when the velocity decreases with respect to time, it is termed negative acceleration.
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