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Forces By: Anushka Singh #522 (Work work (4) (Formula: (W=Fd work), a…
Forces
By: Anushka Singh #522
Newton's First Law of Motion
State of motion
does not change
as long as the
net force is
zero
Inertia
tendency of an object
to resist a change in motion
Because of inertia
you feel a jerk when
brakes are applied
With no outside force
the object will not move
the object will never stop
water rocket
before: speed is zero
shot: thrust increases from zero
rocket is now accelerating
at a speed of more than zero upwards
Newton's Third Law of Motion
For every action
there is an equal
and opposite reaction
Example:
when you throw a ball into a pool
you strike the water with some force
and the water exerts
an equal and
opposite force
on you
equation
F(sub. A) = −F(sub. B)
Newton's Second Law of Motion
that acceleration of a particle
is dependent on the forces
acting upon the particle and
the particle's mass
equation
F=ma
where
F= net force
m=mass
a=acceleration
Water rocket
More force (80 psi)
makes the rocket
shoot up with more speed then
when shot with 50 psi
Energy
Potential Energy
energy an object has because of its position relative to some other object
P.E. = mgh
Kinetic Energy
the work needed to accelerate a body of a given mass from rest to its stated velocity
K.E. = 1/2 m v^2
Mechanical Energy
sum of potential energy and kinetic energy
associated with the motion and position of an object
M = K + P
Work
Formula:
W=Fd
a force that is applied to an object
