Corona SDK transition.to and physics body not acting right

Question

I've got this snippet that seems simple, but doesn't work right. I've got a ball that jumps on screen tap. It does jump on tap, but it seems as if the ball gets heavier with multiple taps and falls down a lot faster. So after about 10 taps it almost falls down off screen instantly. Anyone have any idea why?

local function screenTap (event)
  if ball.y > ceiling then
    transition.to(ball, {time=transitionTime,
                         x = ball.x,
                         y = ball.y - jumpHeight,
                         radius = 25})
  end
end

tapArea:addEventListener ("tap", screenTap)

Answer 1

In physics we don't use transitions. Use force:

myBody:applyForce( 500, 2000, myBody.x, myBody.y )

Two first two values are for force amount (x, y) and the next two defines single point where force is applied.