Question

009 (part 1 of 3) 10.0 points A ball of mass 0.4 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below The velocity of the ball as it leaves the kicker's foot is 16 m/s at angle of 47° above the horizontal. The top of the fence is 4 nm high. The ball hits nothing while in flight and ates air resistance is negligible r 7 The acceleration due to gravity is 9.8 m/s2. 47 4 m d of 20 m of Determine the time it takes for the ball to reach reach the plane of the fence. Answer in units of s. 010 (part 2 of 3) 10.0 points How far above the top of fence will the ball negligible pass? Consider the diameter of the ball to be Answer in units of m planet ct falls 011 (part 3 of 3) 10.0 points What is the vertical component of the velocity when the ball reaches the plane of the fence? leration Answer in units of m/s. 012 10.0 points During a baseball game, a batter hits a pop-
Complete all parts or dont do. Thanks

Answer 1

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d = u_x t, {u_x = u cos theta, where u = 16 m/s and theta = 47 degree d = 20 m so, t = 1 . 83 s h = u_yt - 1/2 gt^2 = (u sin theta) t - 1/2 gt^2 = 4 . 98 m rightarrow height of ball at fence Hence, distance above top of fence is, D = h - 4m = 0 . 98 m v_y = u_y - greaterthanorequalto = u sin theta - greaterthanorequalto = - 6 . 26 m/s (if only magnitude is needed, remove the minus sign)