chapter 3

Question 1

kinetics vs kinematics

Answer 1

kinetics is forces of motion
kinematics is description of motion

Question 2

newtons first law

Answer 2

law of inertia

Question 3

inertia

Answer 3

resistance of an object to changing motion

Question 4

if an object is at rest and the net external force acting on it is zero, the object

Answer 4

remains at rest

Question 5

if an object is in motion and the net external force acting on it is zero, the object

Answer 5

continues moving at a constant velocity in a straight line

Question 6

if an object is at rest, the net external force is

Answer 6

0

Question 7

if an object is in motion at a constant velocity in a straight line, the net external force is

Answer 7

0

Question 8

linear momentum

Answer 8

quantifies current state of motion and resistance to change
L=mv

Question 9

elastic collisions

Answer 9

two objects in a system collide head on and separate

Question 10

coefficient of restitution

Answer 10

ratio between the velocity of separation and the velocity of approach

Question 11

difference between the post impact velocities of two colliding objects

Answer 11

velocity of separation

Question 12

velocity of approach

Answer 12

difference between the preimact velocities of two colliding objects

Question 13

coefficient of resolution letter

Answer 13

e

Question 14

newtons second law

Answer 14

law of acceleration

Question 15

newton second law equation

Answer 15

EF=ma

Question 16

newtons second law: ___ is the effect of force

Answer 16

acceleration

Question 17

newtons second law: lifting a 4.5kg bar upward in your hand, why must your hand force be +45N

Answer 17

to get 0 movement

Question 18

product of average force and duration of force application

Answer 18

impulse

Question 19

impulse changes

Answer 19

momentum, velocity

Question 20

impulse to increase momentum examples

Answer 20

throwing, hitting, push off, thrust

Question 21

impulse to decrease momentum example

Answer 21

catching, landing, giving

Question 22

newtons third law

Answer 22

law of action-reaction

Question 23

law of action-reaction

Answer 23

for every action, there is an equal and opposite reaction