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  • one year ago

Which of Shakina's statements regarding acceleration and velocity is false? 1- "When the acceleration is negative, the velocity can be either negative or positive." 2- "When the acceleration and velocity are in opposite directions, the particle slows down." 3- "When the acceleration is negative, the velocity must also be negative." 4- "When the acceleration and velocity are in the same direction, the particle speeds up."

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  1. Abhisar
    • one year ago
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    Suppose we throw a ball vertically upwards with some velocity V.. In this case the acceleration on the ball will be g but in downward direction though the ball will keeping up to a certain height where its velocity will become zero and then it will fall back. This suggests that whenever the acceleration and velocity are in opposite direction there is a retarding force i.e. the particle slows down. The velocity may be in opposite direction for a while as we have just seen.

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