7- A car is traveling along the negative x-axis begins to slow down as it approaches a traffic light. Then, Its acceleration and its velocity are positive. b- Its acceleration and its velocity are negative. Its acceleration is positive, but its velocity is negative. d- Its acceleration is negative, but its velocity is positive 8- A cannon on the top of a cliff. fires a ball 36.9" below the horizontal direction as shown. The ball hits the ground after 2s at a distance 48 m from the cliff. With what initial speed does the cannon fire the ball? 236.90 a- 20m/'s c-40m/s Cliff b- 30m/s d-50m/s 9- A 50 kg swimmer dives off a cliff with a running horizontal leap, as shown in the figure. What must her minimum speed (in m/s) be just as she leaves the top of the cliff so that she will miss the ledge at the bottom. dall Joels bawi 8.45 m a- 3m/'s c-5m/'s 2.6 m b-4m/'s d-2m/'s 10- ( 2.536+7.96)= a) 10.496 b) 10.49 c) 10.5 d)10.50