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## Homework Statement

A ball of mass 0.9kg is shot from a slingshot at an angle of 60° from the ground. The slingshot is sitting 1m above the ground. The elasticity of the slingshot is k = 700N/m. Take gravity = 10m/s^2

Air resistance must be taken into account also. Use the formula D = ( C*P*(U^2)*A )/2

D = Drag

C = 1

P = 1.2

U = 13.94

A = 0.03142

How far (in the x direction) has the ball travelled when it hits the ground??

## Homework Equations

F = ma

E = 0.5mv^2

d = vt

d = vt + 0.5at^2

D = ( C*P*(U^2)*A )/2 (D = Drag)

## The Attempt at a Solution

The following calculations have already been found:

Initial force in Ball = 350N

Initial Energy in Ball = 87.5J

Time of flight without air resistance = 5.5sec

X-distance travelled without air resistance = 17.4m

Drag = 3.66 kg/s

I don't know how to apply the air resistance (drag) formula/calculation to what I have found.