8:40 A Chapter 10 Prob and... b. The scale reads 20 N when the lower spring has been compressed by 2.0 cm What is the value of the spring constant for the lower spring? c. At what compression length will the FIGURE EX10.17 scale read zero? Section 10.5 Elastic Potential Energy 2/7 18. How far must you stretch a spring with k = 1000 N/i. vOre 200 J of energy? 19. A stretched spring stores 2.0 J of energy. How much energy will be stored if the spring is stretched three times as far? 20. A student places her 500 g physics book on a frictionless table She pushes the book against a spring, compressing the spring by 4.0 cm, then releases the book. What is the book's speed as it slides away? The spring constant is 1250 N/m 21. A block sliding along a horizontal frictionless surface with speed v collides with a spring and compresses it by 2.0 cm. What will be the compression if the same block collides with the spring at a speed of 2v? 22. I A 10 kg runaway grocery cart runs into a spring with spring constant 250 N/m and compresses it by 60 cm. What was the speed of the cart just before it hit the spring? 23. The desperate contestants on a TV survival show are very hungry. The only food they can see is some fruit hanging on a branch high in a tree. Fortunately, they have a spring they can use to launch a rock. The spring constant is 1000 N/m, and they can compress the spring a maximum of 30 cm. All the rocks on the island seem to have a mass of 400 g. a. With what speed does the rock leave the spring? b. If the fruit hangs 15 m above the ground, will they feast or go hungry? 24. As a 15,000 kg jet plane lands on an aircraft carrier, its tail hook snags a cable to slow it down. The cable is attached to a spring with spring constant 60,000 N/m. If the spring stretches 30 m to stop the plane, what was the plane's landing speed? Section 10.6 Energy Diagrams U (J 25. FIGURE EX10.25 is the poten- 6 tial-energy diagram for a 20 g
8:40 A Chapter 10 Prob and... b. The scale reads 20 N when the lower spring has been compressed by 2.0 cm What is the value of the spring constant for the lower spring? c. At what compression length will the FIGURE EX10.17 scale read zero? Section 10.5 Elastic Potential Energy 2/7 18. How far must you stretch a spring with k = 1000 N/i. vOre 200 J of energy? 19. A stretched spring stores 2.0 J of energy. How much energy will be stored if the spring is stretched three times as far? 20. A student places her 500 g physics book on a frictionless table She pushes the book against a spring, compressing the spring by 4.0 cm, then releases the book. What is the book's speed as it slides away? The spring constant is 1250 N/m 21. A block sliding along a horizontal frictionless surface with speed v collides with a spring and compresses it by 2.0 cm. What will be the compression if the same block collides with the spring at a speed of 2v? 22. I A 10 kg runaway grocery cart runs into a spring with spring constant 250 N/m and compresses it by 60 cm. What was the speed of the cart just before it hit the spring? 23. The desperate contestants on a TV survival show are very hungry. The only food they can see is some fruit hanging on a branch high in a tree. Fortunately, they have a spring they can use to launch a rock. The spring constant is 1000 N/m, and they can compress the spring a maximum of 30 cm. All the rocks on the island seem to have a mass of 400 g. a. With what speed does the rock leave the spring? b. If the fruit hangs 15 m above the ground, will they feast or go hungry? 24. As a 15,000 kg jet plane lands on an aircraft carrier, its tail hook snags a cable to slow it down. The cable is attached to a spring with spring constant 60,000 N/m. If the spring stretches 30 m to stop the plane, what was the plane's landing speed? Section 10.6 Energy Diagrams U (J 25. FIGURE EX10.25 is the poten- 6 tial-energy diagram for a 20 g
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter7: Conservation Of Energy
Section: Chapter Questions
Problem 79P: A block of mass 0.500 kg is pushed against a horizontal spring of negligible mass until the spring...
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Question 20
Transcribed Image Text:8:40 A
Chapter 10 Prob and...
b. The scale reads 20 N when the lower
spring has been compressed by 2.0 cm
What is the value of the spring constant
for the lower spring?
c. At what compression length will the
FIGURE EX10.17
scale read zero?
Section 10.5 Elastic Potential Energy
2/7
18. How far must you stretch a spring with k = 1000 N/i. vOre
200 J of energy?
19. A stretched spring stores 2.0 J of energy. How much energy
will be stored if the spring is stretched three times as far?
20. A student places her 500 g physics book on a frictionless table
She pushes the book against a spring, compressing the spring by
4.0 cm, then releases the book. What is the book's speed as it
slides away? The spring constant is 1250 N/m
21. A block sliding along a horizontal frictionless surface with
speed v collides with a spring and compresses it by 2.0 cm.
What will be the compression if the same block collides with the
spring at a speed of 2v?
22. I A 10 kg runaway grocery cart runs into a spring with spring
constant 250 N/m and compresses it by 60 cm. What was the
speed of the cart just before it hit the spring?
23. The desperate contestants on a TV survival show are very
hungry. The only food they can see is some fruit hanging on a
branch high in a tree. Fortunately, they have a spring they can
use to launch a rock. The spring constant is 1000 N/m, and they
can compress the spring a maximum of 30 cm. All the rocks on
the island seem to have a mass of 400 g.
a. With what speed does the rock leave the spring?
b. If the fruit hangs 15 m above the ground, will they feast or go
hungry?
24. As a 15,000 kg jet plane lands on an aircraft carrier, its tail
hook snags a cable to slow it down. The cable is attached to a
spring with spring constant 60,000 N/m. If the spring stretches
30 m to stop the plane, what was the plane's landing speed?
Section 10.6 Energy Diagrams
U (J
25. FIGURE EX10.25 is the poten-
6
tial-energy diagram for a 20 g
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