Biomechanics

Question 1

Velocity Equation

Answer 1

Velocity = displacement / time

Question 2

Momentum equation

Answer 2

Momentum = mass x velocity

Question 3

Acceleration equation

Answer 3

Acceleration = (final-initial) / time taken

Question 4

Force equation

Answer 4

Force = mass x acceleration

Question 5

Newtons 3 Laws

Answer 5

Law of inertia
Law of acceleration
Law of reaction

Question 6

Define Law of inertia

Answer 6

Law of inertia is the body continues in a state of rest or uniform velocity unless acted upon by an external force

Question 7

Define Law of acceleration

Answer 7

Law of acceleration is a body’s rate of change in momentum is proportional to the size of the force applied and acts in the same direction as the force applied

Question 8

Define Law of Reaction

Answer 8

Law of reaction is for every action force applied there is an equal to opposite reaction

Question 9

Define weight

Answer 9

Gravitational pull that the earth exerts on a body.

Question 10

Equation for weight

Answer 10

Weight = mass x acceleration due to gravity

Question 11

Define Reaction

Answer 11

The equal + opposite force exerted by a body in response to the action force placed upon it

Question 12

Define Friction

Answer 12

Force that opposed the motion of two surfaces in contact

Question 13

Define Air resistance

Answer 13

Forces that opposes the motion of a body travelling through the air

Question 14

What is positive net force

Answer 14

Forces are balanced (air resistance + friction)

Question 15

What is negative net force

Answer 15

Forces are balanced so negative net force (weight + reaction)

Question 16

Define Limb Kinematics

Answer 16

Study of movement in relation to time and space

Question 17

Define force plates

Answer 17

Forces plates are used to see how much forces is applied by a limb

Question 18

Define wind tunnels

Answer 18

They are used to test aerodynamic efficiency. Object placed in wind tunnel and measures forced produced by the air against its surface

Question 19

Negatives of Limb kinematics

Answer 19

Highly specialised, expensive and largely limited

Question 20

Negatives to Force plates

Answer 20

Specialist, expensive and housed in laboratory conditions

Question 21

Negatives to wind tunnels

Answer 21

Very specialised facilities, expensive, require complex analysis and housed in engineering bases

Question 22

Mechanical advantage

Answer 22

When the effort arm is longer than it’s load arm

Question 23

Mechanical disadvantage

Answer 23

When the effort arm is shorter than it’s load arm