Physics I, Constant Acceleration Board Work-2 1. An elevator accelerates upward from rest at 0.83 m/s2. How high has it risen after 3.4 s? 2. A boat accelerates from rest at 1.28 m/s for 9.25 s. How far did it move during this time? a. How long in time to reach 100m? 3. A ball is dropped from the top of a 73.0-m tall building. How far has the ball fallen after 2.5 s? How many seconds until it hits the ground? 4. A paint ball is fired straight up at a velocity of 20m/s. If the ball hits the ground in 4.077s later - using g = 10 m/s' down. a. How tall is the person? b. Time to reach firing position? C. Time to maximum height? d. Maximum height? e. Velocity when hits ground? f. Velocity when it returns to the firing position? g. Acceleration at maximum height h. Time to reach 10m from firing position i. Total distance traveled by the paint ball j. See any patterns????????"? 5. A super-genius coyote gets hit by a rock traveling 20 m/s (downward) at the bottom of a creek bed. a. If the rock was initially catapulted straight upward from the top ( 10m above the creek bed - what was its initial upward launch velocity? b. What is the displacement when the velocity is 5m/s (upward) c. 5 m/s downward