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Potential Energy, part 2

Last updated almost 5 years ago

4 questions

1

Question 1

1.

A spring with a force constant of 5.2 N/m has a relaxed length of 2.45 m. When a mass is attached to the end of the spring and allowed to come to rest, the vertical length of the spring is 3.57 m. Calculate the elastic potential energy stored in the spring.

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Question 2

2.

The staples inside a stapler are kept in place by a spring with a relaxed length of 0.115 m. If the spring constant is 51.0 N/m, how much elastic potential energy is stored in the spring when its length is 0.150 m?

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Question 3

3.

When 1.0 kg of apples is loaded into a hanging grocery scale, the spring is stretched a total distance of 0.10 m and the apples rest in a position that is 1.5 m above the ground. What is the total gravitational potential energy of these apples? Assume that the spring constant of the scale is 425 N/m. (The magnitude of the acceleration due to gravity is 9.81 m/s2.)

Question 4

4.

When a 94 kg side of beef is hung from a spring hook the spring stretches 0.15 m. The beef hangs 1.0 m from the floor. What is the total gravitational potential energy of the beef? Assume that the spring constant is 875 N/m. (The magnitude of the acceleration due to gravity is 9.81 m/s2.)