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In cricket a fielder is often placed at the boundary edge as shown - Edexcel - A-Level Physics - Question 17 - 2023 - Paper 1

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In cricket a fielder is often placed at the boundary edge as shown. If the fielder catches the ball, the batter is out. The fielder is 5.0 m away from the batter. T... show full transcript

Worked Solution & Example Answer:In cricket a fielder is often placed at the boundary edge as shown - Edexcel - A-Level Physics - Question 17 - 2023 - Paper 1

Step 1

Determine the horizontal and vertical components of velocity

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Answer

To find the horizontal and vertical components of the velocity, we use the following calculations:

  • Horizontal velocity, vx=vimescos(θ)=23.8×cos(50.0°)15.33m/sv_x = v imes \cos(\theta) = 23.8 \times \cos(50.0°) \approx 15.33 \, \text{m/s}

  • Vertical velocity, vy=v×sin(θ)=23.8×sin(50.0°)18.28m/sv_y = v \times \sin(\theta) = 23.8 \times \sin(50.0°) \approx 18.28 \, \text{m/s}

Step 2

Calculate the time of flight to reach the fielder

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Answer

The time taken to reach the fielder can be found using distance and horizontal velocity:

t=dvx=55.015.333.59st = \frac{d}{v_x} = \frac{55.0}{15.33} \approx 3.59 \, \text{s}

Step 3

Calculate the maximum height of the ball

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Answer

The maximum height can be derived from the vertical motion equations. Since the ball takes half the total time to reach its maximum height:

tup=3.5921.795st_{up} = \frac{3.59}{2} \approx 1.795 \, \text{s}

Using the equation for vertical displacement:

y=vyt12gt2y = v_y t - \frac{1}{2} g t^2

where g=9.81m/s2g = 9.81 \, \text{m/s}^2, we can substitute:

y=18.28×1.79512×9.81×(1.795)216.38my = 18.28 \times 1.795 - \frac{1}{2} \times 9.81 \times (1.795)^2 \approx 16.38 \, \text{m}

Step 4

Determine if the fielder can catch the ball

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Answer

Since the ball reaches a maximum height of approximately 16.38 m, and the fielder is capable of catching the ball only if it is less than 3 meters above the height it was hit, we must consider the initial height (which we can assume as ground level for this scenario). Therefore, its maximum height exceeds 3 m and the fielder cannot catch the ball.

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