7
l/-
l.
Base your answer to the following question on Base your
answer to the follor.ving question on the graph below.
5.
A proton and an anti-proton, each of mass
1.67 x 10-27 kg are in the same general vicinity and have
very small initial speeds. They then annihilate each
other, producing two photons.
4)
c)
!
+i
What is the angle betrveen the paths of the emerging
photons?
0123
B)
D)
J:
30 N.s
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4. In a jousting game, a student of 60 kg is rolled towards a
student of 30 kg at a velocity of 5 m/s are rolled towards
each other, when they collide their poies conserve all of
their kinetic energy as potential energy and redistribute
it. If the the 30 kg student is initially at rest what is her
finalvelocity?
1.6
1$.)
0.5 m/s
the impulse delivered to the passenger.
The impulse delivered to the passenger is reduced
by the presence ofthe airbag.
A)
90.
7. The velocity of the two objects after the collision is most
nearly
The increased area of the airbag reduces the force
on the passenger.
The change in the momentum of the passenger is
reduced by the presence ofthe airbag.
fn. airbag increases the time of irnpact. decreasing
the average force on the passenger.
D) The airbag decreases
D)
qt
A) 1:l B) 1:2 C) 1:3 D) 2:t (l
3. Airbags inflating in a motor vehicle accident protect the
passengersbecause
60"
6. The ratio of the initial kinetic energy to the kinetic
energy after the collision of the trvo balls is
nearly
: ': (i.i(.'e-':,r
Pl ?f
100 N s
iD)
\ .,
C)
an object at rest with a mass of 5 kg. The objects move
together as one after the irnpact.
60 N.s
2. A block sliding on a frictionless surface at l0 rnls hits a
spring rvhich returns the block at the same speed. If the
blocks lrass was 5 kg, what is the irnpulse the block
A) 0.5Ns
C) 50Ns
E) 500Ns
45"
A I kg ball of clay is moving atZ mls when it strikes
90 N.s
experiences?
B)
Base your answers to questions
following scenario:
What is the impulse imparled by the force during this
interval?
A) l0 N.s
@ +s N.t
o"
A)
Time (s)
A)
following question on the
follolving situation.
z
E)
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8. Base your answer to the following question on
9.
following question on the
diagram below which shows three point masses.
Base your answer to the
iCwt=
(ra
z
(-1,0) I
-3
n c is sliding across a frictionless surface
in the positive x-direction with a velocity of magnitude v
o when it collides with a dog of mass m a at rest. The dog
now travels at an angle 30o with respect to the cat's initial
A cat of
maSS
path at a velocity of magnitude v r. The cat travels at an
angle of negative 47o with respect to the dog's path of
motion with a velocity of magnitude vz' Which of the
What are the coordinates of the center of mass of this
system of particles?
A) (*, 8) @
G,*i c) (r, t)
D) (3,
;)
E) (3, B)
10.
following is true?
A) mav tsin3\o : mcv 2sinlTo
ntav sin3}o : tttcrzsin4To
Y) mav rcos3\o : mcv 2coslTo
D) n'tdv tcos3\o : tt'tcrzcos4To
E) mav rcin3}o * mcvzsinlTo :
6)
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t1 drt(.cLr'ot,
nn O
\/,
What is the center of mass for the semi-circle above
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