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1. A long, slinky spring has a spring constant of 1.2 N/m. If the spring is...

1. A long, slinky spring has a spring constant of 1.2 N/m. If the spring is stretched from 20 m to 21.50 m. what is the restoring force exerted by the spring?

a. -1.8 N

b. -2.4 N

c. -25.8 N

d. 0 N

You pull a spring with a spring constant k=300N/m stretching it from its rest length of 0.40m to 0.50m. What is the elastic potential energy stored in the spring?

a. 1.5J

b. 150J

c. 30J

d. -1.5J

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