There is a well-known legend about physicist Isaac Newton.

3.There is a well-known legend about physicist Isaac Newton. It says that he was inspired into his development of the Law of Gravitation while resting under a tree and having an apple fall (free-fall) on his head from one of the branches of the tree. Suppose the apple was 3.90 meters above ground before falling, while Newton’s head was 90 centimeters above ground. How long did it take the apple to hit Newton after falling off? (Apple falls from rest)4.On an open field, a cannonball launches at an angle of 50° with respect to the ground. Some instant later, you observe that the cannonball is still in flight and on its way up. What can you affirm about the cannonball’s velocity at that instant of time as compared to its initial velocity (at launch)? vx and vy stand for the x and y components of the cannonball’s velocity, respectively (with x pointing parallel to the ground and y pointing up, as usual). Choose the best answer and give a short explanation for your choice.a.Both vx and vy have not changed.b.Both vx and vy have increased.c.vx has decreased and vy has increased.d.vx has not changed and vy has decreased.e.vx has increased and vy has not changed.f.vx has increased and vy has decreased.5.Sketch a graph of velocity vs. time for an object that has:a.A positive initial velocity and a constant positive acceleration. b.A positive initial velocity and a constant negative acceleration.c.A positive initial velocity and no acceleration.* By initial, I mean velocity at time = 0. Don’t forget to label your axes. Indicating units is not necessary here.