A ball rolls horizontally off a table of height 1.4 m with a speed of 4 ms. How long does it take the ball to reach the ground?

Using the equation ( h = 0.5 \times g \times t^2 ) where ( h = 1.4 , m ) and ( g = 9.81 , m/s^2 ), we can solve for ( t ). Plugging in the values, we get ( 1.4 = 0.5 \times 9.81 \times t^2 ). Solving for ( t ), we find that it takes approximately 0.53 seconds for the ball to reach the ground.