14. [-/1 Points] DETAILS SERCP11 2.3.P.031. 0/20 Submissions Used A certain aircraft has a liftoff speed of 116 km/h. (a) What minimum constant acceleration does the aircraft require if it is to be airborne after a takeoff run of 246 m? m/s (b) How long does it take the aircraft to become airborne? S Need Help? Read It 15. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER SERCP11 2.3.P.038. 0/20 Submissions Used MY NOTES ASK YOUR TEACHER A car accelerates uniformly from rest to a speed of 45.0 mi/h in 12.0 s. (a) Find the distance the car travels during this time. m (b) Find the constant acceleration of the car. m/s Need Help? Read It 12. [-/1 Points] DETAILS SERCP11 2.1.P.020. 0/20 Submissions Used MY NOTES ASK YOUR TEACHER A particle starts from rest and accelerates as shown in the figure below. a (m/s) 1 0 5 10 -1 t(s) 10 15 20 -2 -3 (a) Determine the particle's speed at t = 10.0 s and at t = 20.0 s. t = 10.0 s t = 20.0 s m/s m/s (b) Determine the distance traveled in the first 20.0 s. (Enter your answer to one decimal place.) m Need Help? Read It 13. [-/1 Points] DETAILS SERCP11 2.3.P.029. 0/20 Submissions Used A truck covers 40.0 m in 9.45 s while uniformly slowing down to a final velocity of 1.40 m/s. (a) Find the truck's original speed. m/s (b) Find its acceleration. m/s Need Help? Read It MY NOTES ASK YOUR TEACHER 9:52 AM Sat Oct 29 webassign.net 17. [-/1 Points] DETAILS SERCP11 2.4.P.046. 0/20 Submissions Used A ball is thrown directly downward with an initial speed of 7.65 m/s, from a height of 30.8 m. After what time interval does it strike the ground? S Need Help? Read It Watch It 18. [-/1 Points] DETAILS SERCP11 2.4.P.050. 0/20 Submissions Used A small mailbag is released from a helicopter that is descending steadily at 2.93 m/s. (a) After 4.00 s, what is the speed of the mailbag? v = m/s (b) How far is it below the helicopter? d = m (c) What are your answers to parts (a) and (b) if the helicopter is rising steadily at 2.93 m/s? v = d = m/s m Need Help? Read It 99% MY NOTES ASK YOUR TEACHER MY NOTES ASK YOUR TEACHER 19. [-/1 Points] DETAILS SERCP11 2.A.P.057. 0/20 Submissions Used MY NOTES ASK YOUR TEACHER A bullet is fired through a board 15.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board. The initial speed of the bullet is 560 m/s and it emerges from the other side of the board with a speed of 460 m/s. (a) Find the acceleration of the bullet as it passes through the board. m/s (b) Find the total time the bullet is in contact with the board. S Need Help? Read It 10. [-/1 Points] DETAILS SERCP11 2.1.P.007. 0/20 Submissions Used A motorist drives north for 29.0 minutes at 94.0 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 2.00 h. (a) What is his total displacement? km (b) What is his average velocity? km/h Need Help? Read It Watch It MY NOTES ASK YOUR TEACHER 11. [-/1 Points] DETAILS SERCP11 2.1.P.009. 0/20 Submissions Used MY NOTES ASK YOUR TEACHER A jet plane has a takeoff speed of V to = 68 m/s and can move along the runway at an average acceleration of 1.7 m/s. If the length of the runway is 3.0 km, will the plane be able to use this runway safely? Yes No Defend your answer. This answer has not been graded yet. Need Help? Read It