Transcript Blank Jeopardy - Cloudfront.net

Gravity and
Projectiles
Potpourri
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Newton’s 1st Newton’s 2nd Newton’s 3rd
Why is it important that a satellite
be above earth’s atmosphere?
So it won’t encounter air resistance
At what angle should a slingshot be oriented
to achieve maximum distance?
45 degrees
What is the acceleration of Gravity?
(Rounded to the nearest tenth)
9.8 m/s
A ball is thrown straight up at 30m/s,
about how long will it be in the air?
6 seconds
Given d=1/2at2
How far will an object
have fallen if it was
dropped from a plane 16
seconds ago?
480m
The kilogram is a measure of an
object’s:
Mass
This gives you both the
magnitude and direction of velocity
What is a velocity vector?
This force ensures that an object, whether rolled or
thrown will always come to a stop.
What is friction?
Who is the coolest teacher ever?
Mr. Golba
How much does one kilogram
weigh in Newtons?
9.8N or 10N
This is the force that
is explained by
Newton’s First Law
What is inertia?
Inertia applies to bodies at rest and:
Bodies in constant motion
If a body has twice the inertia of another body,
it also has twice the_____
Mass of the other body
A large man and a small woman are
on a train that makes a sudden stop.
The woman falls forward but the man
keeps his footing. Who had more
inertia?
The large man
Does a bowling ball have
more inertia on the Earth or
on the Moon?
The same both places
What equation do we use to
describe Newton’s Second Law?
F=ma
10kg brick and a 1kg brick are
dropped in a
vacuum, the force of gravity on the
10kg brick is:
10 times as much
An object is pulled northward at 20N
and southward at 15N.
What magnitude of the net force?
5N
A 1000kg truck is accelerated at 8m/s/s, how
much force was applied to do so?
8000N
Convert this equation into the force gravity
exerts on earth: F=ma
F=ga
Or
F=10a
Or
F=9.8a
Paraphrase Newton’s Third Law
Every action has an equal
and opposite reaction
A high school student hits a nail with a hammer.
During the collision there is a force on which object?
Both nail and hammer
A boxer swings as hard as he can at a helium
balloon then equally hard at a punching bag.
Which object did he hit with more force?
The punching bag
An archer shoots an arrow.
Consider the action force to be
the bowstring pushing against the
arrow. The reaction force is:
The arrow pushing against the bowstring
A rocket is able to propel
itself in in the vacuum of
space by firing its engines. The force
that propels the rocket is:
The exhaust gasses
rushing away from the ship