Tendency to resist changes in motion

Tendency to resist changes in motion Mass The greater the mass, the greater the push required to get the brick moving.

Yes, she would still feel the sluggishness Moose would have trouble changing direction because of its large inertia d C A B D

F F F F F F F

F F T T F F F F F

Tends to stay at rest Tends to stay in motion Acted upon by an unbalanced force f.

Speeding Up Constant Velocity Slowing Down

Slowing Down Speeding Up Constant velocity 15N up 10N left 0

Anna - Hovercraft No – could be slowing down

Newton’s Second Law of Motion

directly inversely 16 32 4 4 Page 12 in Packet

32 64 16 96

C A D B Fnet = 20N Fnet = 0 Fnet = 30N Fnet = 15N M = 5 kg M = 5 kg M = 5 kg M = 5 kg a = 4 m/s/s a = 0 a = 6 m/s/s a = 3 m/s/s

Down 600 N 60 kg 10 m/s/s Down

Down 200 N 60 kg 3.33 m/s/s Down

Left 2000 N 800 kg 2.5 m/s/s Left

Left 4000 N 800 kg 5 m/s/s Left

Right 8 N 2 kg 4 m/s/s Right

Right 16 N M = 4 kg a = 4 m/s/s Right

Ball hits bat Car pushes Man Bug hits bus

Foot pushes Ball Forward Ball pushes Foot Backward Athlete pushes M.B. Forward M.B pushes Athlete Backward Foot pushes Floor Backward Floor pushes Foot Forward

F(Chair) F(Earth) F(person’s mass)

F(stump) F(Earth) F(Shirley’ mass) = 600N

equal greater equal greater equal less equal equal

Tendency to resist changes in motion