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WorksheetsBiomechanics Learning Outcome B Review
Total questions: 27
Worksheet time: 16mins
What does Newton's First Law of Motion state?
A body will remain at rest or at a constant velocity unless compelled to change by an external force acting on it.
The acceleration of a body is proportional to the force causing the acceleration.
For every action, there is an equal and opposite reaction.
Force is the push or pull effect that causes a body to change its state of motion.
According to Newton's Second Law of Motion, what determines the acceleration of a body?
The equal and opposite reaction of forces.
The external force acting in the opposite direction.
The proportionality of the force causing the acceleration and the acceleration itself.
The constant speed of the body in a straight line.
Newton's Third Law of Motion implies that when an object exerts a force on another, the second object will:
Remain at rest unless acted upon by an external force.
Experience an equal force in the opposite direction.
Accelerate proportional to the force applied.
Not change its state of motion unless the force is unbalanced.
Which scenario is an example of Newton's Third Law of Motion?
A cyclist maintaining a constant speed on a flat road.
A footballer changing direction suddenly.
A golfer strikes a ball from a tee.
An athlete pushing downwards on the ground.
What is the measure of force as described in the context of reaction forces?
Meters per second squared (m/s²).
Kilograms (kg).
Newtons (N).
Joules (J).
What is the weight of an athlete whose mass is 75 kg when standing upright without moving?
75 N
736 N
75 kg
9.81 N
According to Newton's Third Law, if an athlete pushes down on the ground with a force of 736 N, what is the force exerted by the ground?
736 N upwards
75 N upwards
9.81 N upwards
0 N
What type of friction occurs when a body moves along a surface and an external force is enough to move it?
Static friction
Kinetic friction
Rolling friction
Fluid friction
Which type of friction is described as the resistance to motion of an object in a fluid due to friction exerted between the body or object and the fluid?
Static friction
Kinetic friction
Rolling friction
Fluid friction
What is the coefficient of friction used to represent?
What is the primary role of friction in sports performance as described in the text?
To reduce the speed and efficiency of athletes
To increase the force generated through athletes' legs
To minimize the energy expended by athletes
To enhance the visual appeal of the sport
According to the text, why were certain types of hi-tech swimming suits banned by FINA in 2010?
They were too expensive for most competitors
They minimized fluid resistance excessively
They changed the color of the water
They were uncomfortable for the swimmers
What is the main function of air resistance (or 'drag') in sports, as explained in the document?
To provide a boost to moving objects
To create a vacuum around projectiles
To oppose the motion of objects or people through air
To increase the temperature of the environment
How does the design of equipment in sports utilize friction to enhance performance?
By allowing for quicker changes in direction or speed
By making the equipment heavier
By reducing the overall cost of sports gear
By simplifying the design for easier manufacturing
What is the dominant force acting on the flight path of a projectile in the absence of air resistance?
Air resistance
Weight
Speed
Angle of release
Which type of flight path does a shuttlecock follow when air resistance becomes dominant compared to its weight?
Parabolic flight path
Nearly parabolic flight path
Linear flight path
Circular flight path
What is the optimal angle of release for sports requiring maximum horizontal distance, such as the long jump?
30 degrees
45 degrees
60 degrees
90 degrees
How does air resistance affect the flight of a football with an average velocity of 35 m/s compared to one with 30 m/s?
Less air resistance with 35 m/s
Greater air resistance with 35 m/s
No difference in air resistance
The football with 30 m/s encounters greater air resistance
What is the primary focus of aerodynamics in sports and exercise science?
The design of sports clothing
The motion of objects through the air
The types of materials used in sports equipment
The physical fitness of athletes
Which type of flow is characterized by smooth layers that do not mix?
Turbulent flow
Laminar flow
Static flow
Dynamic flow
What effect does a smooth surface have on the aerodynamic properties of an object?
Increases drag
Decreases lift
Creates more turbulence
Reduces drag
How does the cross-sectional shape of an object affect its aerodynamics?
Larger cross-sections increase aerodynamic efficiency
Smoother shapes tend to create less turbulent flow
Patterned surfaces are less likely to create drag
All shapes have the same impact on aerodynamics
What is the result of turbulent flow around an object?
Decreases the object's air resistance
Increases the object's speed
Increases the amount of air resistance
Has no effect on the object's movement
What principle describes the upward force exerted by air flowing at different speeds above and below an object or person, which directly opposes the weight of the object?
Gravity Principle
Newton's First Law
Bernoulli's Principle
Archimedes' Principle
What effect is described as the variation in the trajectory of a rotating projectile caused by the Magnus force?
Doppler Effect
Coriolis Effect
Magnus Effect
Venturi Effect
During the 1968 Mexico City Olympic Games, which biomechanical factor contributed to the sudden increase in performance in events like javelin and long jump?
Increased air resistance
Reduced gravitational pull
Higher altitude leading to less air resistance
Improved athletic training techniques
How does the dimple pattern on a golf ball influence its flight?
Increases air resistance and reduces speed
Creates a smooth laminar flow around the ball
Creates a thin turbulent boundary layer that reduces drag
Has no effect on the ball's flight
