Q 3.11 Read each statement below carefully and state with reasons and examples, if it is true or false;

  (d) A particle in one-dimensional motion with positive value of acceleration must be speeding up

Answers (1)
S Sayak

False. The answer to this question depends on the choice of a positive direction. If a ball is thrown upwards and the downwards direction is chosen to be positive then its acceleration will be positive but its speed will still be decreasing.

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