Question

Using Python

a) Add a function to the Projectle class below so it can print out the current status seconds, position, and total velocity (not the x,y components) It should work as ilustrated bekow, so you can directly print the instance of the Projectie object b) If the projectile reaches ts maximum height automatically print a message with the current time and height. Make sure this only prints once if time is updated continucusty You do not need to calculate the actual maximum height, just assume the time is updated in small enough increments to approximale it After parts a and b are completed, the Projectile should behave ske this P Projectile (47,40) in range(75): P.update(e.05) print(p) for After 2.9 seconds, naximum height at 43.66 After 3.75 seconds, position is x: 182:30 n, Y: 40.80 m, velocity is 28.29 m/s

Answer 1

from math import sin, cos, radians

class Projectile:

"""Simulate the flight of a simple projectiles near the earth's surface

ignoring wind's resistance. Tracking is done in two dimensions, height (y) and distance (x)"""

def __init__(self, angle, velocity, height=0):

""" Create a Projectile with given launch angle, initial velocity and height"""

self.xpos= 0.0

self.seconds = 0

self.ypos = height

theta = radians(angle)

self.xvel = velocity * cos(theta)

self.yvel = velocity * sin(theta)

def update(self, time):

"""Update the state of this projectile to move it time seconds farther into the flight"""

self.xpos = self.xpos + self.xvel * time

yvel1 = self.yvel - 9.8 * time

self.ypos = self.ypos + time * (self.yvel + yvel1)/2.0

self.yvel = yvel1

self.seconds += time

# Check if maximum height reached

if(round(self.yvel) == 0 and self.yvel > 0 ):

print(f'After %.2f seconds, maximum height at %.2f m.'%(self.seconds, self.ypos))

def __str__(self):

"""Prints the details about the projectile"""

return f'After %.2f seconds, position is X: %.2f m, Y: %.2f m, velocity is %.2f m/s' %(self.seconds,self.xpos, self.ypos, self.xvel)

p = Projectile(47, 40)

for _ in range(75):

p.update(0.05)

print(p)

Python 3.7.4 (default, Jul [GCC 6.3.0 20170516] on linux After 2.95 seconds, maximum height at 43.66 m After 3.75 seconds, position is X: 102.30 m, Y: 40.80 m, velocity is 27.28 m/s 9 2019, 00:06:43)