On a distant planet,a projectile of mass 2 kg is launched horizontally with initial velocity 45 m/s from a certain height. Just before it lands on the horizontal terrain, its velocity makes an angle 20 degrees with the horizontal. The acceleration due to gravity is 15 m/s^2.
Part 1: Find the speed of the projectile just before landing. I found this to correctly be 47.9 m/s.
Part 2: Find the time the projectile spends in the air.
Part 3: Find the height h from which the projectile is launched.
Part 4: Find the horizontal range of the flight.

Question

On a distant planet,a projectile of mass 2 kg is launched horizontally with initial velocity 45 m/s from a certain height. Just before it lands on the horizontal terrain, its velocity makes an angle 20 degrees with the horizontal. The acceleration due to gravity is 15 m/s^2.
Part 1: Find the speed of the projectile just before landing. I found this to correctly be 47.9 m/s.
Part 2: Find the time the projectile spends in the air.
Part 3: Find the height h from which the projectile is launched.
Part 4: Find the horizontal range of the flight.

jaredstone4 · Answer

|dw:1424372983016:dw| And here's how I drew out the problem. Any help for Parts 2-4 is appreciated!