IB SEHS 4.3_#1

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

Tags

NGSS.HS-PS2-1

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

Tags

NGSS.HS-PS2-2

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.

Tags

NGSS.MS-PS2-2

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

Tags

NGSS.HS-PS2-2