Basic Biomechanics

Question 1

what is the equation for force

Answer 1

force = mass x acceleration

Question 2

what are forces

Answer 2

pushes or pulls which enable us to start or stop moving

Question 3

what are tensile forces

Answer 3

pulling forces acting on the ends of an internal structure (muscle onto bone and tendon)

Question 4

what are compressive force

Answer 4

pushing force acting on the end of an internal structure

Question 5

what are some contact forces

Answer 5

ground reaction force, friction, air resistance

Question 6

what are some non contact forces

Answer 6

gravity, electromagnetic

Question 7

what are colinear forces

Answer 7

same line of action, same or opposite direction

Question 8

what is the resultant force

Answer 8

vector addition of two or more forces

Question 9

what is the net force

Answer 9

vector addition of ALL external forces on an object

Question 10

what are concurrent forces

Answer 10

act through the same point but not along the same line

Question 11

what is the equation for weight

Answer 11

weight = mass x gravity

Question 12

what is the value of gravity to 2dp

Answer 12

9.81m/s^2

Question 13

where is our center of gravity

Answer 13

around 55% of our height around out hip

Question 14

how may center of gravity differ

Answer 14

based on our height age gender weight…

Question 15

what techqniue is used in high jump to get over the bar

Answer 15

the fosbury flop - COG goes under the bar but you go over

Question 16

what is newtons first linear law

Answer 16

every body remains in its state of motion unless compelled to change by external forces

Question 17

what is inertia

Answer 17

the resistance of a body to change its motion

Question 18

what is newtons second law

Answer 18

law of acceleration, force = mass x acceleration

Question 19

what is newtons third law

Answer 19

to every action there is a equal and opposite reaction

Question 20

what happens if the ground reaction force is greater than the body weight

Answer 20

the individual will accelerate upwards

Question 21

what is impulse

Answer 21

equal to the area under a force time curve, change of momentum of an object when a force is applied

Question 22

what needs to be done for a succesful landing

Answer 22

reduce velocity to 0, reduce momentum to 0

Question 23

what happens when you land stiff

Answer 23

as all joints are extended there will be alot more force on the muscles and lead to greater chance of injury