week 1

Question 1

definition of kinematics
definition of kinetics

Answer 1

describes motion/movement
describes forces

Question 2

displacement

Answer 2

final position - initial position

Question 3

velocity (m/s)

Answer 3

change in displacement (m) / time (s)

Question 4

acceleration (m/s2)

Answer 4

change in velocity (m/s) / time (s)

Question 5

newtons first law

Answer 5

an object remains at rest or continues to move with constant momentum unless acted on by net force

Question 6

newtons second law

Answer 6

the objects change in momentum is proportional to the force causing it, with the change taking place in the direction in which the force acts§

Question 7

force (kgm/s2)

Answer 7

mass (kg) x acceleration (m/s2)

Question 8

weight

Answer 8

mass x acceleration due to gravity (9.81)

Question 9

newtons third law

Answer 9

for every action there is an equal and opposite reaction

Question 10

ground reaction force

Answer 10

reaction force applied by the ground to the body

Question 11

centre of mass

Answer 11

conceptual point on body where all persons mass is thought to be concentrated