chpater 4 . biomechanics

Question 1

newtons first law (angular motion)

Answer 1

the angular momentum of a body remains constant unless action upon by an external torque

Question 2

newtons second law (angular motion)

Answer 2

a torque applied to an object will produce a change in angular motion in the direction of the applied torque that is directly proportional to the size of the torque.

Question 3

newtons third law (angular motion)

Answer 3

for every torque there is an equal and opposite torque

Question 4

torque

Answer 4

angular motion is caused by an eccentric force, which is caused when the force doesn’t go through the COG. this causes an object to rotate.

Question 5

angular distance

Answer 5

the sum of all angular chnages

Question 6

angular displacement

Answer 6

the initial position compared to the final position

Question 7

angular speed

Answer 7

angular distnace divided by time.

Question 8

angular velocity

Answer 8

velocity is the rate of change of angular displacement divided by time.

Question 9

angular acceleration

Answer 9

change in speed measured in degrees ,and can be positive negative or 0.

Question 10

projectile motion

Answer 10

any object travelling through air is projectile.
affects:
- gravity
-air resistance
-friction
- drag force