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Warm Up #45
Why is it hot in the summer and cold in the winter?
A. Because the Earth is closer to the Sun in the summer and farther in the winter.
B. The Earth’s revolution around the Sun is faster in the summer and slower in the winter.
C. The Earth rotates on a tilted axis
Warm Up # 46
In your own
Warm Up #47
A 1600 kg car moving at 20
m/s takes a turn around a
circle with a radius of 25.0
m. Determine the centripetal
Warm Up #48
Calculate the
momentum of a 8 kg
ball rolling at a
Warm Up #49
Calculate the impulse
of a diver hitting the
water with a force of
45 N
Warm Up #50
A car of mass 1100 kg
moves at 24 m/s. What
braking force is
Warm Up #51
What average force is
exerted on a 25 gram egg
by a sheet if the egg hits
Warm Up #52
A 100 kg quarterback is travelling
5 m/s and is stopped by a tackler
in 1.0 seconds. Calculate:
The initial momentum of the quarterback
The impulse imparted by the tackler
Warm Up #53
Two physics students, Will N. Andable
and Ben Pumpiniron are in the weight
room. Will lifts the 100 pound barbell
over his head 10 times in one minute;
Ben lifts the 100 pound barbell over
his head 10 times in 10 seconds.
Which student does the most work?
Warm Up #54
A 0.5 kg basketball hits a wall
head-on with a forward speed
of 18 m/s. It rebounds with a
speed of 13.5 m/s. The contact
Warm Up #55
What will be the KE
of an arrow having a
PE of 50 J after it is
Warm Up #56
Calculate the work
done when a 15 N
force lifts a box 10
Warm Up #57
A 1000 kg car travelling
with a speed of 25 m/s skids
to a stop. The car
experiences an 8000 N force
of friction. Determine the
Warm Up #58
Two balls roll along the tracks shown,
starting from rest. At the end of the tracks,
which ball will have the most KE? Which will
arrive first?
A
Warm Up #59
State the Law of
Warm Up #60
How many digits of
Pi can you name?
Warm Up #61
How much work is
needed to lift an object
that weighs 200 N to a
Warm Up #62
What is the power
output of an engine
that does 60,000 J
Warm Up #63
Which is heavier,
Warm Up #64
In the absence of air resistance, a ball
of mass m is tossed upward to reach a
height of 20 m. At the 10 m position,
half way up, the net force on the ball is
Warm Up #65
A spacecraft on its way from Earth to
the Moon is pulled equally by Earth
and Moon when it is
a)
Closer to the Earth’s surface
b)
Closer to the Moon’s surface
c)
Half way from Earth to Moon
d)
At no point, since Earth always
Warm Up #66
Two cats are on a
Why don’t I fall out when a roller coaster goes
upside down?
A. Gravity is counteracted by the force of acceleration, which is the force that pushes you forward.
B. The frame of reference gets flipped upside down, so there is no apparent change to the rider.
C. People fall out of roller coasters all the time.
D. What’s a roller coaster?
Warm Up #68
What dog can
Does water go down the drain
counterclockwise in the northern
hemisphere and clockwise in the
southern hemisphere?
A. Yes B. No
C. It’s the other way around (CW in NH and CCW in SH)
D. It all depends upon how the water was introduced and the geometric structure of the drain.
E. What are you talking about Mrs. Linton?!?
What’s your favorite color and
why?
What was your favorite thing to do
in physics class this year and why?
What was the least favorite thing
that you did in physics class this
year and why?
