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A professional golfers club strikes a ball on a T and lunch is the ball at an angle of 40°. Which one of the following statements concerning the acceleration of the ball is true, if the effects of air resistance are ignored?

1. While the ball is in the air, its acceleration is 0 m/s squared.

2. While the ball is in the air its acceleration is 9.8 m/s squared.

3. The acceleration is equal to (9.8 m/s squared) (Sin40°) equals 6.3 m/s squared.

4. At the highest point of the balls flight, its acceleration is instantaneously equal to 0 m/s squared.

5. As it is rising, its acceleration decreases from 9.8 m/s squared to 0 m/s squared at its highest point.

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