A ball rolls over the edge of a platform with only a horizontal velocity. The height of the platform is 1.6 m and the horizontal range of the ball from the base of the platform is 20 m. What is the horizontal velocity of the ball just before it touches the ground? Neglect air resistance

The horizontal velocity of the ball just before it touches the ground is 10.32 m/s

Explanation:

Given;

Horizontal distance of the ball, x = 20m

Vertical displacement of the ball, y = 1.6m

let the horizontal velocity of the ball = vx

The horizontal distance of the ball is given as;

The vertical displacement of the ball is given as;

Substitute in equation (i) into equation (ii)

From equation (i), x = Vx*t

Vx = x/t

Vx = 20/1.938

Vx = 10.32 m/s

Therefore, the horizontal velocity of the ball just before it touches the ground is 10.32 m/s

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