Question-Looking for code to help with a collision

Questions
1

I know how to detect if two sprites collide but I am still looking for how to make, let’s say a ball and a player, if the player collides with the ball then the ball needs to move in the opposite direction that the sprite came from. Just got codea recently and I am still learning any help would be greatly appreciated.

2

@dRaXuS Here’s a simple pong type example. Slide your finger left/right anywhere on the screen to move the paddle Left/right.

displayMode(FULLSCREEN)

function setup()
    physics.continuous=true
    -- create ball
    b=physics.body(CIRCLE,20)
    b.x=WIDTH/2
    b.y=HEIGHT-100
    b.restitution=1
    -- create screen edges
    e1=physics.body(CHAIN,true,vec2(0,0),vec2(0,HEIGHT),
            vec2(WIDTH,HEIGHT),vec2(WIDTH,0))
    -- create paddle
    p=physics.body(POLYGON,vec2(-30,0),vec2(30,0),vec2(30,-5),vec2(-30,-5))
    p.x=WIDTH/2
    p.y=200
    p.type=KINEMATIC
end

function draw()
    background(40, 40, 50)
    fill(255)
    ellipse(b.x,b.y,40)
    stroke(255)
    strokeWidth(5)
    line(p.x-30,p.y,p.x+30,p.y)
end

function touched(t)
    if t.state==MOVING then
        p.linearVelocity=vec2(t.deltaX*50,0)
    end
end