[first song] rebirth of me in py introductory training (2): formula programming

It's not easy to create , Before reference , Point a praise , Collection , You can't pay too much attention , Family

The first 1 Turn off ： Expression solving - Calculation of the position of the small ball thrown vertically

The task of this level takes the calculation of the position of throwing the ball vertically as an example , Pay attention to how to convert mathematical calculation formula into Python Expression and evaluate . Students should read relevant knowledge carefully , Find the mathematical operators and Python Correspondence between numeric operators , Complete the programming task and output the result of formula calculation .

#    Please add the implementation code here    #
# ********** Begin *********#
v=v0-g*th=v0*t-1/2*g*t*t
print(h)   
# ********** End **********#

The first 2 Turn off ： Output format control - Celsius - Fahrenheit temperature conversion

When we calculate mathematical formulas , The result of calculation often has infinite decimals , such as 34.333333..., In the face of this situation , We usually keep the significant numbers after the decimal point to make the results more concise and beautiful .

The task of this pass is expressed in centigrade - Take Fahrenheit temperature conversion as an example , Pay close attention to Python How to control the output of formatted strings .

#    Please add the implementation code here    #
# ********** Begin *********#
c=(F-32)*5/9
F=('%.2f' % F)
c=('%.2f' % c)
str=' Fahrenheit {} degree = Celsius {} degree '.format(F,c)
print(str) 
# ********** End **********#

The first 3 Turn off ： The use of library functions - Ball resistance falling motion

#    Please add the implementation code here    #
# ********** Begin *********#
import math
v=math.sqrt(m*g/u)*math.tanh(t*math.sqrt(u*g/m))
x=m/u*math.log(math.cosh(math.sqrt(u*g/m)*t))
v=('%.2f' % v)x=('%.2f' % x)
str1=' When t={} seconds , Speed v={} rice / second '.format(t,v)
str2='{} Seconds later , The position of the ball is downward {} rice '.format(t,x)
print(str1)print(str2) 
# ********** End **********#

The first 4 Turn off ： Comprehensive application - Oblique upward throwing of small ball

This task requires the comprehensive application of the knowledge and technology in the previous training tasks , Find the distance that the ball moves in the vertical direction when it is thrown obliquely .

#    Please add the implementation code here    #
# ********** Begin *********#
import math
t=math.pi/180*thetav0=25/3.6
g=9.8
y0=1
x=0.5
y=x*math.tanh(t)-((1/(2*v0))*((g*(x**2)/((math.cosh(t)**2)))+y0  
print('y The value is calculated as ：{} rice '.format(y))
# ********** End **********#

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