60. reaction time is usually greater that 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it? A. at least 3.0 cm B. at least 4.9 cm C. at least 6.8 cm D. at least 9.8 cm 61. A ball is thrown straight up, reaches a maximum height, then falls to its initial height. As the ball is going up: A. both its velocity an its acceleration point downward. B. its velocity points downward and its acceleration points upward C. its velocity points upward and its acceleration points downward D. both its velocity and its acceleration point upward.
60. reaction time is usually greater that 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it? A. at least 3.0 cm B. at least 4.9 cm C. at least 6.8 cm D. at least 9.8 cm 61. A ball is thrown straight up, reaches a maximum height, then falls to its initial height. As the ball is going up: A. both its velocity an its acceleration point downward. B. its velocity points downward and its acceleration points upward C. its velocity points upward and its acceleration points downward D. both its velocity and its acceleration point upward.
Motion%20along%20a%20line.docx