Question

An experiment to measure the value of g is constructed using a tall tower outfited with two sensing devices, one a distance H above the other. A small ball is fired straight up in the tower so that it rises to near the top and then falls back down; each sensing device reads out the time that elapses between the ball going up past the sensor and back down past the sensor. 1) Choose an expression for g using times ti, t2, and the height H. -I 8H Submit 2) Determine the value of g if H equals 25.1 m, ty equals 6.01 s, and t2 equals 4.00 s. (Express your answer to three significant figures.) m Submit

Answer 1