A projectile is launched with an initial speed of 40.0 m/s at an angle of 40.0° above the horizontal. The projectile lands on a hillside 4.00 s later. Neglect air friction
a) What is the projectile's velocity at the highest point of its trajectory? (30.6 m/s)
b) What is the straight-line distance from where the projectile was launched to where it hits its target? (122.4 m)
c) What was the impact velocity of the projectile?