A person throws a ball straight up in the air, giving it an initial speed of 30 m/s. What is the velocity of the ball after 4.2 s? 

Question 2 A ball rolls horizontally off the edge of a brick wall at 4.00 m/s. What is the height of the brick wall if the ball lands a distance of 3.0 m from the base of the wall? 

Question 3 A 1000-kg car is driving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a stop in a distance of 140 m. What is the constant force applied to the car to bring it to rest? 

Question 4 A block moves up a 20.0 incline, from its base, with an initial speed of 12.0 m/s. The surface of the incline is frictionless. How far along the surface of the incline does the block slide before it starts to move down the incline?