A particle moves along the x axis. its position is given by, Ask an Expert

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Q. A particle moves along the x axis. Its position is given by the equation 2.00 + 3.00t - 4.00t^2 with x in meters and t in seconds. Find out (1) its position at the instant it changes direction and (2) its velocity when it returns to the position it had at t 0.

Q. A 0.142 kg baseball travelling 47.40 m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 10.5 cm. What was the magnitude of average force applied by the ball on the glove?

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