Please help ASAP! Thank you very much!
Roxenna attaches her 1.50 kg textbook to a 5.0 m, 4.00 N/m cord. She then drops it from a platform, 12.0 m off of the ground. Please show calculations step by step.
Which of the following choices equals the elastic force in the cord at point 2?
a. 4.0 N
b. 6.0 N
c. 8.0 N
d. 12 N
20 N
