An object is travelling from a point A to B along a straight line path. What is the direction of its acceleration if
(a) it is speeding up
(b) its speed is decreasing? Does the direction change if origin is changed?
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Answer:
acceleration is rate of change of velocity.
Velocity is a vector.
A vector has MAGNITUDE and DIRECTION. The magnitude of VELOCITY is the SPEED of the object.
If you read the wording of the question, the speed is NOT changing.
The DIRECTION is NOT changing.
Conclusion: the VELOCITY is NOT CHANGING.
No change in velocity means ZERO acceleration
Explanation:
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