Homework Help: Pre-Ap Physics

Posted by Maria on Monday, September 24, 2012 at 4:57pm.

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 2.65 km/s at
an initial inclination of 41.9◦ to the horizontal.
The acceleration of gravity is 9.8 m/s
2
.
How far away did the shell hit?
Answer in units of km

Pre-Ap Physics - Scott, Monday, September 24, 2012 at 7:49pm
the initial vertical velocity is __ (2650 m/s) * cos(41.9º)

the time of flight is the initial vertical velocity divided by the gravitational acceleration __ 2 * [(2650 m/s) * sin(41.9º)] / (9.8 m/s^2)

the horizontal velocity is __ (2.65 km/s) * cos(41.9º)

the range is the horizontal velocity multiplied by the flight time

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