A ball is thrown vertically upwards. The positive direction is taken to be in upward direction.
Which of the following is the correct sign of the quantities during its ascent?

POSITION VELOCITY ACCELERATION
(A) Positive Positive Positive
(B) Positive Positive Negative
(C) Positive Negative Negative
(D) Negative Positive Negative
(E) Negative Negative Negative

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Solution

The correct option is B B
During ascent ball is going upward therefore its position is positive. Now , though the velocity is decreasing but its direction is upward i.e. positive. Ball is moving under the effect of gravitational acceleration , which is always acting vertically downwards so it is negative.

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