3. A helicopter travelling at a velocity of 12 m/s [W] accelerates uniformly at a rate of 7.0 m/s' [ for 4.0s. What is the helicopters final velocity? 4. Two go-carts, A and B, race each other around a 1.0 km track. Go-cart A travels at a constant speed of 20.0 m/s. Go-cart B accelerates uniformly from rest at a rate of 0.333 m/s'. Which Go-cart wins the race and by how much time? 5. A boat increases it's speed from 5.0 m/s to 7.5 m/s over a distance of 50.0 m. What is the boat's acceleration? 6. Within 4.0s of lift-off, a spacecraft that is uniformly accelerating straight upwards from rest reaches an altitude of 4.50 x 10' m [Up]- a. What is the spacecraft's acceleration? b. At what velocity is the spacecraft travelling when it reaches this altitude? 7. A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s'. Determine the time for the feather to fall to the surface of the moon. 8. An engineer is designing a runway for an airport. Several planes will use the runway and the engineer must design it so that it is long enough for the largest planes to become airborne before the runway ends. If the largest plane accelerates at 3.30 m/s' from rest and must reach a take-off speed of 88.0 m/s, then what is the minimum allowed length for the runway? 9. Renata Gas is driving through town at 25.0 m/s and begins to accelerate at a constant rate of -1.0 m/s'. Eventually Renata comes to a complete stop. Represent Renata's accelerated motion by sketching a velocity-time graph. Use kinematic equations to calculate the distance which Renata travels while decelerating. Then use the velocity-time graph to determine this distance. 10. Otto Emissions is driving his car at 25.0 m/s. Otto accelerates at 2.0 m/s' for 5 seconds. Otto then maintains a constant velocity for 10 more seconds. Determine the distance Otto travelled during the entire 15 seconds. (Consider using a velocity-time graph.)