2. Newton’s First Law
An object will remain in its current state of motion, either
constant speed or at rest, until it enters the presence of an
unbalanced force to change its motion.
3. The soccer ball, acted upon by
the normal force of a foot
kicking it, will go on forever
with a velocity of 2 m/s
because Newton’s first law
states that an object in
motion will stay in motion...
The soccer ball is at
rest because the foot
serves as an
unbalanced force, N,
on the ball.
4. Newton’s Second Law
The net force acting on an object is a
result of the object’s mass multiplied by its
acceleration.
5. The force of friction is acting on the bike, which
allows it to move.
The imperfections in the tires’ surfaces and the
road enable the friction force to affect the
motion of the bike.
6. Newton’s Third Law
Every action or force has an equal and
opposite reaction and force. The forces are
equal and opposite of each other at the
point of contact.
7. The force of the volleyball on our arms is equal and opposite to the
force of our arms on the volleyball.
The result of this action-reaction
force pair can be seen from the red
marks on a player’s forearms from
the volleyball.
