With Solutions

11.A car starts and accelerates at a constant 4 m/s in 1 second. Determine speed and distance after 10 seconds. 12. A car travels at 40 m/s, decelerates at a constant 4 m/s2 until rest. Determine speed and distance after decelerating in 10 seconds! 13. A body moves along the x- axis according to the relation x=1-2t+3t2x=1-2t+3t2, where x is in meters and t is in seconds. Find the Acceleration of the body when t = 3 s 14. At the scene of a car accident, the forensic investigator measured the skid marks from one of the vehicles to be 83 m long. He also knows the typical acceleration for a car when you slam on the brakes is -4 m/s 2. The speed limit for this area is 100 km/hr (about 28 m/s). Was the car speeding before it hit the brakes? 15. A car accelerates from rest at 1.0 m/s2 for 20.0 seconds along a straight road . It then moves at a constant speed for half an hour. It then decelerates uniformly to a stop in 30.0 s. Find the total distance covered by the car