WorksheetsIB SEHS 4.3_#1
Total questions: 47
Worksheet time: 24mins
What is the centre of mass of a body?
The geometric centre of the body
The average weight between the appendicular and axial skeletons
The point equidistant between the navel and the third lumbar vertebrae
The point at which the mass and weight of a body/object are balanced in all directions
Which is the equation for force?
Force = mass × acceleration
Force = displacement ÷ time
Force = velocity ÷ time
Force = velocity × mass
Which type of lever is used in plantar flexion?
First
Second
Third
No lever is used in plantar fl exion
Which of the labels for the lever system are correct?
Effort: Y, Fulcrum: Z, Load: X
Effort: Z, Fulcrum: X, Load: Y
Effort: X, Fulcrum: Y, Load: Z
Effort: Y, Fulcrum: X, Load: Z
Which of the following defines momentum?
force × time
velocity × time
mass × velocity
mass × distance
Which of the following describes Newton’s second law of motion?
The rate of change of momentum of a body is proportional to the force causing it.
To bring about motion a force must be applied.
When one body applies a force to another the second body will apply an equal and opposite force back.
The effect of a constant force on a mass will always be the same.
Which of the following correctly labels the components of the Bernoulli principle?
Y has higher relative air velocity and X has lower relative air pressure
Y is a region of lower relative air velocity and lower relative air pressure
X has lower relative air velocity and Y has higher relative air pressure
X is a region of lower relative air velocity and higher relative air pressure
A sports scientist measures the force that is being applied by a baseball into a glove and the time over which the force is being applied. Which of the following can be calculated from
the measurements?
Impulse
Friction
Torque
Height of release
Which biomechanical aspect is a gymnast attempting to maximize when they tuck during a somersault?
Moment of inertia
Angular momentum
Angular velocity
Bernoulli effect
Which of the following are vector quantities?
I Momentum
II Impulse
III Velocity
IV Speed
I and III only
I, II and III only
II and III only
I, III and IV only
Which statement best describes Newton’s second law of motion?
An object on which no net forces are acting has no change in velocity.
The rate of change of acceleration of an object is proportional to the force applied and acts in the direction of the force.
For every action there is an equal and opposite reaction.
An object will remain stationary or will move at a constant velocity or in a straight line.
A tricep extension is which type of lever?
First
Second
Third
Fourth
Which of the following statements identifies how a spinning golf ball generates lift?
I Back spin increases the speed on the upper surface of the ball.
II The pressure on the upper surface of the ball is less than the pressure on the lower surface of the ball.
III The pressure on the upper surface of the ball is higher than the pressure on the lower surface of the ball.
I only
III only
I and II only
II and III only
Which statement is correct for an athlete performing the Fosbury Flop high jump technique?
The centre of mass remains inside the body during flight.
The centre of mass moves outside the body during flight.
The centre of mass remains fixed outside the body during flight.
The centre of mass remains fixed inside the body during flight.
How is centre of mass best defined?
The point of application of a force
The force acting toward the centre
A balance point of the body
The line along which a force acts
Which of the following describes a third class lever?
I. Effort force acts between the fulcrum and the load force.
II. Load force acts between the fulcrum and the effort force.
III. Effort force and load force are on opposite sides of the fulcrum.
I only
I and II only
II and III only
I, II and III
Which of the following states that force is the product of mass multiplied by acceleration?
Newton’s first law
Newton’s second law
Bernoulli’s principle
Law of angular momentum
Which type of lever is shown in the diagram below?
First class
Second class
Third class
Resistance class
Which best describes Newton’s first law of motion?
An unbalanced force acts on a body
For every action force, there is an equal and opposite reaction force
An object will remain stationary or will move at a constant velocity or in a straight line
The amount of change in the momentum of an object
Which of the following affects the flight path of a projectile?
Height of release
Displacement of release
Centre of mass
Moment of inertia
What does the Bernoulli principle refer to?
Projectile motion
Centre of mass
Angle of release
Moment of inertia
What is displacement?
The speed of an object in a certain direction
The amount of motion possessed by a moving body
The rate of change in velocity
The shortest distance from the initial to the final position of a moving body
What is the equation used in Newton's law of acceleration?
a = f x m
f = m x a
m = f x a
Using Newton's formula for acceleration, how much mass does an object have if its acceleration is 80 m/s and the force applied was 24N
19.2 kg
0.3 kg
30 g
What law best describes the action when a high jumper is pushing off the ground before the jump?
Newton's 1st law (inertia)
Newton's 2nd law (acceleration)
Newton's 3rd law (reaction)
Newton's first law of motion states that 'an object will remain at rest or in it's current state of motion unless ...' what?
Acted upon by an unbalanced force.
It's mass is too great.
It is pushed, kicked or hit.
There is no gravity present.
Newton's third law of motion states that 'for every action there is ...' what?
An unbalanced force acting upon it.
A chain of reactions.
An equal and opposite reaction.
A range of possible outcomes that may occur.
Striking a cricket ball with a cricket bat is an example of which of Newton's 3 laws of motion?
Law of Acceleration
Law of Action and Reaction
Law of Inertia
A baseball sitting stationary on a t-ball stand is an example of which of Newton's 3 laws of motion?
Law of Acceleration
Law of Action and Reaction
Law of Inertia
What class of lever is shone in the picture?
1st
2nd
3rd
4th
What are the TWO MAIN benefits that biomechanics has on an athlete?
Increased performance
Breaking world records
Getting new equipment
Reduced risk of injury
You can improve stability by:
Increasing Base of Support
Increasing the mass of a body
Lowering the Centre of Gravity
Leaning forward
Stability of an object depends on:
Where the mass of the body is in relation to the velocity that it has created
Where the mass of the body is in relation to its dynamic balance
Where the line of gravity is in relation to the base of support
where the line of gravity is in relation to the static balance
Which of the following would help an ice skater spin faster?
Having better fitness
Having their body parts close to the axis of rotation
Having their arms out wide
A tight outfit
Fill in the missing information for the definition of balance:
Balance is the ability of an object to maintain _________ or ___________ whilst moving or stationary. Balance varies due to the position of the body, the surface that you are standing on or movement.
(a)
What is the correct definition for 'force'.
Force is anything that acts on and object.
Force is anything that accelerates an object or person in the correct direction of intent.
Force is anything that causes or has the potential to cause movement, diversion or slowing of the object on which it acts.
How do yo calculate force?
Force = weight x speed
Force = mass x acceleration
Force = momentum x weight
What is the correct formula for momentum?
Momentum = weight x force
Momentum = mass x velocity
Momentum = velocity x force
What are the factors affecting the flight of a projectile?
angle of release
air resistance
height of release
speed of release
gravity
