Biomechanics

What information does a velocity give that a speed does not give?

• rate of change of distance

• direction

• units of measurement such as km/h or mi/h

• how fast something travels

A object goes from point X to Y and then come back from Y to X. What is the displacement and average velocity?

• displacement is zero, Average velocity is also zero

• displacement is increase, Average velocity is also increase

• displacement is increase, Average velocity is also decrease

• displacement is increase, Average velocity is also zero

define instantaneous acceleration

• acceleration at a particular instant of time

• acceleration at a particular distance

• acceleration at a particular velocity

• acceleration at a particular displacement

When one object is travelling with a constant velocity, its acceleration will be 

• decreasing
• increasing
• constant
• zero

If you can control both static equilibrium and dynamic equilibrium, then you are ____

• balanced
• static
• accelerating
• none of these

Low center of gravity leads to more stability

• true
• false
• sometimes true -sometimes false
• does anyone REALLY know the answer to this kind of question?

A soccer ball accelerates more than a bowling ball when thrown with the same force.

• Law of Inertia
• Law of Acceleration
• Law of Conservation of Momentum

A student leaves a pencil on a desk and the pencil stays in the same spot until another student picks it up.

• Law of Inertia
• Law of Acceleration
• Law of Conservation of Momentum

Two students are in a baseball game. The first student hits a ball very hard and it has a greater acceleration than the second student who bunts the ball lightly.

• Law of Inertia
• Law of Acceleration
• Law of Conservation of Momentum

Which of these best defines the term 'biomechanics'?

• The machinery or working parts of something.

• The study of the mechanical laws relating to the movement or structure of living organisms.

• The branch of applied mathematics dealing with motion and forces producing motion.

• The branch of science concerned with the nature and properties of matter and energy.