Work has no direction. But, still, it can be positive or negative. It doesn't imply :
Positive work accelerates a body.
Negative work decelerates a body.
Positive work increases the kinetic energy of a body.
Negative work accelerates a body.
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If the displacement is perpendicular to the direction of the force then work is zero. If there is zero work, then will be no displacement (assuming 0 initial velocity). ... But to reiterate - work will only be positive or negative. It will never have a direction associated with it.
Positive work accelerates a body.
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