I'm a freshman student in the university, and I have to solve 50 questions to finish my assignment on the projectile motion, and I'm stuck with these three questions. I wish anybody can help me as fast as he or she can, because it's my first time to study the projectile motion. (My assignment is due to sunday 30th september). 1. The problem statement, all variables and given/known data Here is the first problem: A refile is aimed horizontally at a target 50 m away. The bullet hits the target 2.0 cm below the aim point. a. What was the bullet's flight time? b. What was the bullet's speed as it left the barrel? My second problem: A projectile is fired with an initial speed of 30 m/s at an angle of 60(degrees) above the horizontal. The object hits the ground 7.5 s later. a. How much higher or lower is the launch point relative to the point where the projectile hits the ground? b. To what maximum height above the launch point does the projectile rise? c. What are the magnitude and direction of the projectile's velocity at the instant it hits the ground? The final problem is: A stunt man drives a car at a speed of 20 m/s off a 30-m-high cliff. The road leading to the cliff is inclined upward at an angle of 20(degrees). a. How far from the base of the cliff does the car land? b. What is the car's impact speed?(I didn't understand what is an impact speed) 2. Relevant equations The range equation: d=((Vi)2.sin(2@))/g Xf= Xi + Vixt yf= yi + Viyt - 1/2g(t)2 g= 9.8 m/s2 3. The attempt at a solution I didn't understand these three problems, even i didn't know how to draw them, so plz help me because i'm tired from the other problems that i had solve.