Professional rugby players wear a tracking device that measures their velocity and acceleration - AQA - GCSE Physics Combined Science - Question 2 - 2021 - Paper 2
Question 2
Professional rugby players wear a tracking device that measures their velocity and acceleration.
Figure 2 shows a player wearing a tracking device.
The player is t... show full transcript
Worked Solution & Example Answer:Professional rugby players wear a tracking device that measures their velocity and acceleration - AQA - GCSE Physics Combined Science - Question 2 - 2021 - Paper 2
Step 1
What is a vector quantity?
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Answer
A vector quantity is defined as a quantity with both magnitude and direction. In this case, you should tick the box for "A quantity with both magnitude and direction."
Step 2
Which of the following is a vector quantity?
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Answer
Among the given options, displacement is the vector quantity. Therefore, tick the box for "Displacement."
Step 3
Determine the acceleration of the player between 0 and 1.6 s.
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To find acceleration, we can use the formula:
ext{Acceleration} = rac{ ext{Change in velocity}}{ ext{Time taken}} = rac{(4 - 0)}{(1.6 - 0)} = rac{4}{1.6} = 2.5 ext{ m/s}^2
Step 4
Describe the motion of the player between 3.4 s and 3.6 s.
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Answer
The motion of the player between 3.4 s and 3.6 s can be described as a case of constant deceleration. The velocity remains constant, suggesting there is no acceleration during this interval where the player is likely not increasing or decreasing speed.
Step 5
Write down the equation which links acceleration (a), mass (m) and resultant force (F).
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The equation that links acceleration, mass, and resultant force is given by Newton's second law:
F=mimesa
Step 6
Calculate the mass of the player.
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To find the mass of the player, we use the formula derived from Newton's second law. Given that the resultant force (F) is 1800 N and the acceleration (a) is 25 m/s², we rearrange the equation:
m = rac{F}{a} = rac{1800}{25} = 72 ext{ kg}
Step 7
Suggest one advantage of the data being sent during the game.
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One advantage of the data being sent during the game is that it allows coaches and analysts to monitor player performance in real-time, enabling them to make informed decisions adjust strategies immediately.
