A) A scalar quantity where direction is needed / known. B) A vector quantity where direction is needed / known. C) A vector quantity that refers to the distance travelled irrespective of direction. D) A scalar quantity that refers to the distance travelled irrespective of direction. E) Answers A and D are correct A) A scalar quantity where direction is needed / known. B) A vector quantity where direction is needed / known. C) A vector quantity that refers to the distance travelled irrespective of direction. D) A scalar quantity that refers to the distance travelled irrespective of direction. E) Answers A and D are correct

The position of the head of a golf club before ball impact (t = 0.020 s) is summarised in the table below: \( \begin{array}{ll}\text { Time (s) } & \text { Position (m) } \\ 0.016 & 1.472 \\ 0.018 & 1.577 \\ 0.020 & 1.672\end{array} \) What is the velocity of the club between 0.016 s & 0.018 s and 0.018 s & 0.020 s, and the acceleration of the club between these velocities?

A) 47.5 m/s, 52.5 m/s and -2500 m/s2 B) 52.5 m/s, 47.5 m/s and 2500 m/s2 C) 52.5 m/s, -47.5 m/s and -2500 m/s2 D) 47.5 m/s, 52.5 m/s and 2500 m/s2 E) 52.5 m/s, 47.5 m/s and -2500 m/s2 A) 47.5 m/s, 52.5 m/s and -2500 m/s2 B) 52.5 m/s, 47.5 m/s and 2500 m/s2 C) 52.5 m/s, -47.5 m/s and -2500 m/s2 D) 47.5 m/s, 52.5 m/s and 2500 m/s2 E) 52.5 m/s, 47.5 m/s and -2500 m/s2

Exam 1: Kinematics of Linear Motion

Stability is decreased when the centre of gravity (COG) of the object lies nearer the lower part of the object and when a vertical line through the COG falls within the base of support the object.

(True/False)

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Question 21

Use the equation 'Moment = force (Mass of limb x acceleration due to gravity) × perpendicular distance from axis of rotation' to calculate the moment about the OX axis for the hand when: 0.006 = the percentage of mass of the whole body for this segment expressed as a decimal (i.e., a proportion of 1.0 or 0.6%) 82 = athlete's mass in kilograms (kg) 9.81 = acceleration due to gravity expressed in m/s² 1.40 = perpendicular distance from OX which is 140 cm to be expressed in meters (m) along Y

(Short Answer)

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Question 22

Which of the following graphs would be most likely to represent the relationship between velocity and the optimal angle of a projectile that is released from a higher position than it lands?

(Multiple Choice)

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Question 23

Speed and velocity cannot be measured in the same units because speed does not account for direction.

(True/False)

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Question 24

Convert 3 hours 23.6 minutes into seconds

(Short Answer)

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Question 25

The centre of mass (COM) is defined as:

(Multiple Choice)

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Question 26

The top graph in the figure below shows position vs time of an athlete performing a shuttle run (i.e. forwards and backwards). Which of the four graphs below this (a - d) is most likely to represent the athlete's velocity vs time for the same movement?

(Multiple Choice)

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Question 27

A pair of equal and opposite parallel forces that will often cause rotations of objects about specific axis is called:

(Multiple Choice)

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Question 28

Convert 3 hours 23.6 minutes into hours

(Short Answer)

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Question 29

A golf ball is struck with a velocity of 16 m/s at an angle of 56º. What is its range (i.e. horizontal displacement) if it lands at the same height that it was struck from?

(Multiple Choice)

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Question 30

Provide some examples of scalar quantities in sport

(Essay)

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Question 31

What is meant by the term linear kinematics?

(Multiple Choice)

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Question 32

Figure A4.5 -Considering Figure A4.5, the knee flexes with it's greatest angular velocity at the start of the stride

(True/False)

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Question 33

Displacement is:

(Multiple Choice)

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Question 34

If an obect is placed on a table in static equilibrium and exerts a force of - 35N onto the table, the reaction force from the table would be 35N.

(True/False)

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Question 35

It is possible to have a 'negative acceleration' value while the athlete or object is actually 'speeding' up.

(True/False)

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Question 36

Convert 37.67 minutes into minutes and seconds

(Short Answer)

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Question 37

The position of the head of a golf club before ball impact (t = 0.020 s) is summarised in the table below: Time (s) Position (m) 0.016 1.472 0.018 1.577 0.020 1.672 What is the velocity of the club between 0.016 s & 0.018 s and 0.018 s & 0.020 s, and the acceleration of the club between these velocities?

(Multiple Choice)

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Question 38

The stability of an object can be increased by lowering the center of gravity closer to the ground, increasing the base of support and maintaining the centre of gravity within the base of support. Stability is also increased in objects with greater mass.

(True/False)

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Question 39

You have an athlete lying on a centre of gravity board. Use the formula: x₁ = (W₃ . d)/W₁ to calculate the x₁ (the horizontal distance from the fulcrum to the body centre of gravity) when: Athlete = 62kg d = 3.5m W₃ = 171N

(Essay)

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Question 40

Showing 21 - 40 of 55

Stability is decreased when the centre of gravity (COG) of the object lies nearer the lower part of the object and when a vertical line through the COG falls within the base of support the object.

Which of the following graphs would be most likely to represent the relationship between velocity and the optimal angle of a projectile that is released from a higher position than it lands?

Speed and velocity cannot be measured in the same units because speed does not account for direction.

Convert 3 hours 23.6 minutes into seconds

The centre of mass (COM) is defined as:

The top graph in the figure below shows position vs time of an athlete performing a shuttle run (i.e. forwards and backwards). Which of the four graphs below this (a - d) is most likely to represent the athlete's velocity vs time for the same movement?

A pair of equal and opposite parallel forces that will often cause rotations of objects about specific axis is called:

Convert 3 hours 23.6 minutes into hours

A golf ball is struck with a velocity of 16 m/s at an angle of 56º. What is its range (i.e. horizontal displacement) if it lands at the same height that it was struck from?

Provide some examples of scalar quantities in sport

What is meant by the term linear kinematics?

Figure A4.5 -Considering Figure A4.5, the knee flexes with it's greatest angular velocity at the start of the stride

Displacement is:

If an obect is placed on a table in static equilibrium and exerts a force of - 35N onto the table, the reaction force from the table would be 35N.

It is possible to have a 'negative acceleration' value while the athlete or object is actually 'speeding' up.

Convert 37.67 minutes into minutes and seconds

The stability of an object can be increased by lowering the center of gravity closer to the ground, increasing the base of support and maintaining the centre of gravity within the base of support. Stability is also increased in objects with greater mass.

You have an athlete lying on a centre of gravity board. Use the formula: x₁ = (W₃ . d)/W₁ to calculate the x₁ (the horizontal distance from the fulcrum to the body centre of gravity) when: Athlete = 62kg d = 3.5m W₃ = 171N

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