Question

During World War I, the Germans had a gun
called Big Bertha that was used to shell Paris.
The shell had an initial speed of 1.96 km/s at
an initial inclination of 48.2◦ to the horizontal.
The acceleration of gravity is 9.8 m/s2 .
How far away did the shell hit?
Answer in units of km.

Answer 1

hf=hi+vi*sin48.2*t-4.9t^2

hi,hf =0, solve for t

then, range= viCos48.2*t

change km/s to m/s