# Cannonball Trajectory Problem

#### Overberg

Homework Statement
A cannon fires a ball at 140 m/s
at an angle of 35 degrees above
the horizontal.
• Find the position of the ball 9.25
seconds after launch.
• Find its velocity 9.25 seconds after
launch.
• Is the ball on its way up or down?
• How long does it take the ball to
arrive at the same level as it was
launched?
• What is its velocity when it arrives at
the same level as it was launched?
• What is the angle at which it arrives
at the same level as it was launched?
Homework Equations
v_x=v_xi
x-x_i=v_xi(t)
𝑣𝑦 = 𝑣𝑦𝑖 − 𝑔t
𝑦 − 𝑦𝑖 = 𝑣𝑦(t)-1/2gt^2

Related Introductory Physics Homework Help News on Phys.org

#### BvU

Homework Helper
Hello Ovreberg, !

Please read the guidelines: if you expect helpers to decipher things like
you did not understand them. Either type your work (preferred) or post a very clear picture with textual explanation what you do.

I can decipher a $\vec v = \sqrt{....}$ which can't be right: LHS is a vector and RHS is a scalar !

#### fresh_42

Mentor
2018 Award
Hello!

It is easy to type in formulas on PF, have a look on how it is done:
Images if necessary are better seen, if it is the only focus. But mspaint and an upload will do in many cases.

"Cannonball Trajectory Problem"

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