Question 1 (12 marks]
a) A ball is kicked horizontally from the roof of a building that is 300m tall and lands about 400m from
the base of the building.
i. Calculate the initial speed of the ball.
ii.
Calculate the final speed of the ball just before it hits the ground.
iii.
Find the angle of the ball relative to the positive x axis.

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

What happens to an isotope during radioactive decay?