7. A man weighs a fish with a spring scale attached to the ceiling of an elevator. While the elevator is at rest, he measures a weight of 49.0 N. a) What weight does the scale read if the elevator accelerates upward at 2.00 m/s? b) What weight does the scale read if the elevator accelerates downward at 2.00 m/s? 8. A 2500 kg van accelerates down an icy driveway, going from rest to 30.0 m/s in 6.00 s. During its motion, a 0.i00 kg stuffed toy hangs by a cord from the van's ceiling. The van's acceleration is such that the cord remains perpendicular to the ceiling. Determine the: a) angle e; and the b) tension in the cord. 9. In a "Giant Swing" shown in figure, the seat is connected to two cables. One is from the top of the central shaft which makes an angle of 40.0" with the vertical and the other cable of 7.50 m is horizontal. The seat swings in a horizontal circle at a rate of 25.1 m/s. If the seat weighs 245 N and a 540 N person is sitting in it, find the tension in each cable. 40.0 10. Consider a banked wet curved roadway, where there is a coefficient of static friction of 0.30 and a coefficient of kinetic friction of 0.25 between the tires and the roadway. The radius of the curve is R- 50 m. If the banking angle is A = 25 a) What is the maximum speed the automobile can have before sliding up the banking? b) What is the minimum speed the automobile can have before sliding down the banking? 7.50m- Answers: 1. a) 69.3 N; b) 34.6 N 2 a) 40.0 N; b) 69.3 N 3. 1,395 N 4. a) 7.06N ; b) 8.14 N 5. a) 30.6 kg ; b) 8.97 kg 6. a) (1) 9.32 N (11) 17.2 N (Ii) 17.2N b) 10.4 m/s 7. a) 59 N ; b) 39 N 8. a) 30.7 b) 0.843 N 9. a) 1,025 N b) 6,088 N 10. a) 20.9 m/s b) 8.46 m/s
7. A man weighs a fish with a spring scale attached to the ceiling of an elevator. While the elevator is at rest, he measures a weight of 49.0 N. a) What weight does the scale read if the elevator accelerates upward at 2.00 m/s? b) What weight does the scale read if the elevator accelerates downward at 2.00 m/s? 8. A 2500 kg van accelerates down an icy driveway, going from rest to 30.0 m/s in 6.00 s. During its motion, a 0.i00 kg stuffed toy hangs by a cord from the van's ceiling. The van's acceleration is such that the cord remains perpendicular to the ceiling. Determine the: a) angle e; and the b) tension in the cord. 9. In a "Giant Swing" shown in figure, the seat is connected to two cables. One is from the top of the central shaft which makes an angle of 40.0" with the vertical and the other cable of 7.50 m is horizontal. The seat swings in a horizontal circle at a rate of 25.1 m/s. If the seat weighs 245 N and a 540 N person is sitting in it, find the tension in each cable. 40.0 10. Consider a banked wet curved roadway, where there is a coefficient of static friction of 0.30 and a coefficient of kinetic friction of 0.25 between the tires and the roadway. The radius of the curve is R- 50 m. If the banking angle is A = 25 a) What is the maximum speed the automobile can have before sliding up the banking? b) What is the minimum speed the automobile can have before sliding down the banking? 7.50m- Answers: 1. a) 69.3 N; b) 34.6 N 2 a) 40.0 N; b) 69.3 N 3. 1,395 N 4. a) 7.06N ; b) 8.14 N 5. a) 30.6 kg ; b) 8.97 kg 6. a) (1) 9.32 N (11) 17.2 N (Ii) 17.2N b) 10.4 m/s 7. a) 59 N ; b) 39 N 8. a) 30.7 b) 0.843 N 9. a) 1,025 N b) 6,088 N 10. a) 20.9 m/s b) 8.46 m/s
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter6: Applications Of Newton's Laws
Section: Chapter Questions
Problem 37P: An elevator filled with passengers has a mass of 1.70103kg . (a) The elevator accelerates upward...
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solve all 4 problems pls. i really need it. its my last question already pls.
Transcribed Image Text:7. A man weighs a fish with a spring scale attached to the ceiling of an elevator. While
the elevator is at rest, he measures a weight of 49.0 N.
a) What weight does the scale read if the elevator accelerates upward at 2.00 m/s?
What weight does the scale read if the elevator accelerates downward at 2.00
m/s?
8. A 2500 kg van accelerates down an icy driveway, going from
rest to 30.0 m/s in 6.00 s. During its motion, a 0.100 kg stuffed
toy hangs bya cord from the van's ceiling. The van's
acceleration is such that the cord remalns perpendicular to the
ceiling. Determine the:
a) angle e; and the
b) tension in the cord.
9. In a "Giant Swing" shown in figure, the seat is connected to two
cables. One is from the top of the central shaft which makes an
angle of 40.0" with the vertical and the other cable of 7.50 m is
horizontal. The seat swings in a horizontal circle at a rate of 25.1
m/s. If the seat weighs 245 N and a 540 N person is sitting in it,
find the tension in each cable.
40.0
10. Consider a banked wet curved roadway, where there is a
coefficient of static friction of 0.30 and a coefficient of kinetic
friction of 0.25 between the tires and the roadway. The radius of
the curve is R- 50 m. If the banking angle is = 25
a) What is the maximum speed the automobile can have before
sliding up the banking?
b) What is the minimum speed the automobile can have before
sliding down the banking?
7.50m
Answers:
1. a) 69.3 N; b) 34.6 N
2. a) 40.0 N; b) 69.3 N
3. 1,395 N
4. a) 7.06N ; b) 8.14 N
5. a) 30.6 kg ; b) 8.97 kg
6. a) (1) 9.32 N (i) 17.2 N () 17.2 N
b) 10.4 m/s
7. a) 59 N ; b) 39 N
8. a) 30.7°
b) 0.843 N
9. a) 1,025 N
b) 6,088 N
10. a) 20.9 m/s
b) 8.46 m/s
36
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