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*You can receive marks for this question even if the previous question was answered incorrectly. 2 Use the following information to answer the next two questions.
A particular supertanker is fully loaded with oil and has a mass of
1.00 × 109 kg. The supertanker has a cruising speed of 20.0 km/h. One way
to stop the ship is to reverse its engines. At maximum reverse thrust, the ship
takes 32.0 min to stop. Numerical Response
2. The momentum of the supertanker at cruising speed, expressed in scientific notation,
is b × 10w kg.m/s. The value of b is __________.
(Record your threedigit answer in the numericalresponse section on the answer sheet.) Numerical Response
3. The kinetic energy of the supertanker at cruising speed, expressed in scientific notation,
is b × 10w J. The value of b is __________.
(Record your threedigit answer in the numericalresponse section on the answer sheet.) 5. An empty freight car of mass m coasts along a track at 2.00 m/s until it couples
to a stationary freight car of mass 2m. The final speed of the two freight cars
immediately after collision is
A.
B.
C.
D. 1.50 m/s
1.33 m/s
1.15 m/s
0.667 m/s 3 Use the following information to answer the next three questions.
On July 16, 1994, one of the fragments of comet ShoemakerLevy 9 entered
Jupiter’s atmosphere travelling at 60.0 km/s.
As a comet fragment approaches a planet and before it enters the atmosphere,
it gains kinetic energy according to the formula ∆Ek = G Mp m 1 − 1 rf ri where G
Mp
m
r =
=
=
= gravitational constant
mass of the planet
mass of the fragment
distance from the centre of the planet to the fragment As the fragment approached Jupiter’s surface, the atmosphere became too
dense for the fragment to push through. The fragment’s tremendous kinetic
energy was dissipated in an enormous explosion.
The mass of Jupiter is 318 times the mass of Earth. The mass of the comet
fragment was 6 000 kg.
6. The kinetic energy of the comet fragment as it entered into Jupiter’s
atmosphere was
A. 1.08 × 107 J B. 1.8...
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This note was uploaded on 01/14/2014 for the course PHYSICS Physics 30 taught by Professor Quinlan during the Fall '09 term at Centennial High School.
 Fall '09
 Quinlan
 Physics

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