Unformatted text preview: nd _____.
(Record all three digits of your answer in the numerical-response section on the answer sheet.) 5. Which of the following units are correct units for momentum?
A. J.s B.
N/J 3 Use the following information to answer the next four questions.
The distribution of energy released during the burning of gasoline in a car is
Energy Wasted as Heat
from Engine Parts Energy Delivered to the
Car’s Drive Train Used to
released Used to overcome
air resistance and
frictional forces between
tires and road
(5%) Gasoline releases 30.2 MJ/L during burning. A particular car has a mass of
1.60 × 103 kg. In a test drive, the car accelerated from 3.00 m/s to 15.0 m/s
over a distance of 115 m. 6. The maximum amount of energy that would be delivered to the drive train when
65.0 L of gasoline is burned is
A. 1.51 × 102 MJ B.
D. 3.93 × 102 MJ
1.96 × 103 MJ
9.82 × 103 MJ 4 7. The change in the kinetic energy of the car during the test drive is
B. 1.15 × 105 J C. 1.73 × 105 J D. 8. 9.60 × 103 J 1.80 × 105 J The magnitude of the impulse on the car during the test drive is
A. 4.80 × 103 kg.m/s B. 1.92 × 104 kg.m/s C. 2.40 × 104 kg.m/s D. 2.88 × 104 kg.m/s Use your recorded answer from Multiple Choice 8 to answer Numerical Response 3.*
3. The average net force on the car during the test drive, expressed in scientific
notation, is a.bc × 10d N. The values of a, b, c, and d are ____, ____, ____,
(Record all four digits of your answer in the numerical-response section on the answer sheet.) *You can receive marks for this question even if the previous question was answered incorrectly. 5 Use the following information to answer the next three questions.
90 m Ski Jump
An elevation profile of the 90 m ski jump at Canada Olympic Park in
Calgary is shown below. The skiers slide down a 111 m long ramp before
taking off at the “table point.” The distance from the table point to the “norm
point” (the beginning of the steepest section of the landing hill) is 90 m,
hence the name of the jump. Farther downhill, at the end of a straight section
of 24.0 m, is the “critical point.” If skiers fly past the critical point, it
becomes dangerous to land because the landing hill starts to flatten out. 52.5 m Start point Table point 42.0 m Skier’s trajectory
Take-off ramp 24 .0 m Critical
point Landing hill During a ski jumping competition, a skier’s speed at the table point was
95 km/h, and she landed at the critical point with a speed of 85 km/h. The
combined mass of the skier and her equipment was 60 kg.
9. The change in the skier’s gravitational potential energy as she moved from the
table point to the critical point was
D. –2.5 × 104 J
–3.3 × 104 J
–3.6 × 104 J
–6.7 × 104 J 6 10. Current ski jumping techniques actually slow down the ski jumpers on the way
to the bottom of the hil...
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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