When a mass is placed on a spring with a spring constant of 15 newtons per meter, the spring is compressed 0.25 meter. How much elastic potential energy is stored in the spring? (2) 0.94 J (3) 1.9 J (1) 0.47 J (4) 3.8 J

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Chapter1: Units, Trigonometry. And Vectors
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please help with questions 23,24, and 25
23 When a mass is placed on a spring with a spring
constant of 15 newtons per meter, the spring is
compressed 0.25 meter. How much elastic
potential energy is stored in the spring?
(1) 0.47 J
(2) 0.94 J
(3) 1.9J
(4) 3.8 J
24 A vertically hung spring stretches 0.075 meter
when a 5.0-newton block is attached to the spring
What is the spring constant for this spring?
[Assume the spring-block system is at rest.]
(1) 38 N/m
(2) 67 N/m
(3) 130 N/m
(4) 650 N/m
25 The unstretched spring in the diagram below has
a length of 0.40 meter and a spring constant k. A
weight is hung from the spring causing it to
stretch to a length of 0.60 meter,
Unstretched
Stretched
0,40 m
0.60 m
Weight
How many joules of elastic potential energy are
stored in this stretched spring?
(1) 0.020 × k
(2) 0.080 X k
(3) 0.18 x k
(4) 2.0 × k
Transcribed Image Text:23 When a mass is placed on a spring with a spring constant of 15 newtons per meter, the spring is compressed 0.25 meter. How much elastic potential energy is stored in the spring? (1) 0.47 J (2) 0.94 J (3) 1.9J (4) 3.8 J 24 A vertically hung spring stretches 0.075 meter when a 5.0-newton block is attached to the spring What is the spring constant for this spring? [Assume the spring-block system is at rest.] (1) 38 N/m (2) 67 N/m (3) 130 N/m (4) 650 N/m 25 The unstretched spring in the diagram below has a length of 0.40 meter and a spring constant k. A weight is hung from the spring causing it to stretch to a length of 0.60 meter, Unstretched Stretched 0,40 m 0.60 m Weight How many joules of elastic potential energy are stored in this stretched spring? (1) 0.020 × k (2) 0.080 X k (3) 0.18 x k (4) 2.0 × k
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