# Direction of a thrown ball

1. Apr 15, 2007

### grando69

1. The problem statement, all variables and given/known data
A child throws a ball with a speed 20ms-1 from a window 5m above horizontal ground. If the ball hits the ground 1.5 seconds later, find the direction of the projection.

2. Relevant equations
The basic equations of motion:
s=ut+1/2at^2
v=u+at
v^2=u^2+2as

3. The attempt at a solution

2. Apr 15, 2007

### hage567

What have you tried? Show your thoughts.

3. Apr 15, 2007

the horizontal component will be: $$ut\cos \theta$$
the vertical component will be: $$ut\sin \theta - \frac{{gt^2 }}{2}$$