40. A toboggan accelerates from rest at 1.1 m/s. After 10 seconds, how fast is it going? Show 7 steps. 41. At the bottom of the hill, the toboggan moving 12 m/s forward accelerates at -0.50 m/s for 10 s. What is the toboggan's velocity at the end of the 10 s? Show the equation used and all steps. Show 7 steps. 42. How long does it take a car travelling south at 12 m/s to increase its velocity to 26 m/s south if it accelerates at 3.5 m/s south? Show 7 steps. 33. A car is travelling down the road. Its v vs. t graph is shown below. Sketch the d vs t graph that shows the motion. Velocity (m/s) 22 20 10 16 14 2 . . 12 Time (s) 14 16 18 20 34. A car is moving forward, but the brakes are applied. Sketch the d vs t graph of this motion. Show some tangent lines on your graph showing fast, slower, and stopped. 80 80 60 60 40 40 20 20 displacement (m) -20 -40 time (s) 10 10 20 40 40 30 30 50 50 45. A stone is dropped from a cliff. What is its velocity after 1 second? After 2 seconds? Show 7 steps. 46. A ball is thrown straight up into the air at 14 m/s. How long does it take for the ball to slow down to an upward velocity of 6.0 m/s? Show 7 steps. 47. a) If you throw a rock up into the air, when is its velocity zero? b) What is the acceleration when the velocity is zero? Show 7 steps. 48. A rock is thrown downwards with an initial velocity of 8.0 m/s. What is the velocity of the rock after 1.5 s? Show 7 steps.