First time poster, site looks very informative so I thought I would make a post. This is for Mechanics class and now covering Dynamics. This is my take home problem.(adsbygoogle = window.adsbygoogle || []).push({});

A basket ball player shoots when she is 5 m from the backboard. Knowing that the ball has an intial velocity Vo at an angle of 30⁰ with the horizontal, determine the value of Vo when d is equal to (a) 228 mm, (b) 420 mm.

1. The problem statement, all variables and given/known data

given info:

x: player is 5M from back board

y: initial height of ball 2m from floor, hoop is 3.048m from floor

angle: 30⁰

d: this is the distance from the back board or offset

2. Relevant equations

x = Vo cos(30)*t

y = Yo + Vo*sin(30)t - 1/2gt^2

3. The attempt at a solution

x = 5m - .288m = 4.772m

4.772m = Vo*cos(30)*t

Vo = 4.772/cos(30)

y = 2m + (4.772m/cos(30))*sin(30)t - 1/2(9.81)t^2

t = .987s

Vo = 4.772/cos(30)*(.987s)

= 5.44m/s

Using same method

b = 5.13m/s

Found a picture for the problem on the net for better clarity:

http://books.google.com/books?id=A_...esnum=3&ved=0CBEQ6AEwAg#v=onepage&q=&f=false"

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Need work checked(dyanmics projectile problem)

**Physics Forums | Science Articles, Homework Help, Discussion**