motion

Question 1

biomechanics

Answer 1

the study of human movement from a mechanical perspective

Question 2

types of motion

Answer 2

• linear
• angular

Question 3

linear motion

Answer 3

when a body moves in either a straight line or curved path
metres

Question 4

angular motion

Answer 4

involves rotation around a central axis or a fixed point
when a body moves along a circular path
degrees

Question 5

types of forces

Answer 5

• applied
• gravitational
• frictional

Question 6

forces

Answer 6

a push or pull that causes an object to change shape or accelerate

Question 7

applied force

Answer 7

forces that one object exerts on another eg kicking a ball

Question 8

gravitational force

Answer 8

weight
the force of attraction between two bodies or objects

Question 9

frictional force

Answer 9

occurs when two surfaces come into contact with each other eg. ice skates have a low surface area to reduce friction

Question 10

torque

Answer 10

when a force is applied outside the centre of gravity. changes angular motion, makes an object spin
torque= force(f) x lever arm (r)

Question 11

how to increase torque?

Answer 11

• increase the length of the lever arm (eg. with an object such as a raquet or by flexing/extending the body)
• increase force (kick/throwing harder, get stronger over time

Question 12

lever arm (r)

Answer 12

distance from axis of rotation to the line of force (radius of rotation)

Question 13

force (f)

Answer 13

weight force acting through the centre of gravity