A baseball leaves the bat of Henry Aaron with a speed of 34 m/s at an angle of 370 above the horizontal. The ball is 1.2 m off the ground when it leaves the bat. To be a home run, the ball must clear a fence that is 3.0 m high and 106 m from the batter. (a.) At what times after being hit will it reach the height of the fence? (b.) How far from the batter will the ball be at these times? (c.) Will Henry have a home run? Explain

Respuesta :

(a) The time taken for the ball to reach the height of the fence is 4.1 s.

(b) The position of the ball from the batter at the time is 111.33 m.

(c) Henry will have a home run.

Time to reach the height of the fence

The time taken for the ball to reach the height of the fence is calculated as follows;

[tex]h = v_0_y t - \frac{1}{2} gt^2\\\\(3 - 1.2) = (34 \times sin37)t - \frac{1}{2} (9.8)t^2\\\\1.8 = 20.46t- 4.9t^2\\\\4.9t^2 - 20.46t+ 1.8 = 0\\\\a = 4.9, \ b = -20.46, \ c = 1.8\\\\t = \frac{-b\pm \sqrt{b^2 - 4ac} }{2a} \\\\t = 4.1 \ s[/tex]

Position of the ball at the time

The position of the ball at the time is calculated as follows;

[tex]X = v_x t\\\\X = (34 \times cos37) \times 4.1\\\\X = 111.33 \ m[/tex]

Since, 111.33 m is greater than 106 m, Henry will have a home run.

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