Answer Happy

The acceleration due to gravity, unless otherwise stated, is 9.8m/s^2 [down]. You may use components or trigonometry to solve 2D problems. QUESTION 1 A toy rocket is shot upwards from the ground with an initial speed of 8.1m/s. a) Calculate both times at which the toy rocket is 1.2m above the ground. b) At each of those times, at what velocity is the rocket travelling at? c) What is the maximum height of the rocket? QUESTION 2 A golfer hits a golfball off a cliff from 8.5 metres above flat ground. The golfball is hit with an initial velocity of 43m/s [33 degrees above the horizontal]. a) What is the time of flight of the golfball? b) What is the horizontal range of the golfball? QUESTION 3 From its nest, a bird flies 113m [21 degrees E of S]. It turns and flies another 316m [36 degrees W of S]. This motion takes a time of 23 seconds. a) Calculate the average speed of the bird. b) Calculate the average velocity of the bird. QUESTION 4 A drone is flying in air with an initial velocity of 22.5m/s[S]. 3.85 seconds later, the drone has a final velocity of 12.9m/s [N]. What was its average acceleration during this time? QUESTION 5 A car is travelling on a road with an initial velocity of 22.5m/s[11.0 degrees S of W]. The car turns into another road and goes at a final velocity of 12.9m/s [11.0 degrees W of S]. What was its average acceleration if the turning motion took 3.85 seconds?