1) A force of 2 pounds is required to hold a spring stretched 0.2 feet beyond...

1) A force of 2 pounds is required to hold a spring stretched 0.2 feet beyond its natural length. How much work (in foot-pounds) is done in stretching the spring from its natural length to 0.9 feet beyond its natural length?

2) Work of 3 Joules is done in stretching a spring from its natural length to 19 cm beyond its natural length. What is the force (in Newtons) that holds the spring stretched at the same distance (19 cm)?

3) How much work is done lifting a 40-pound object from the ground to the top of a 30-foot building if the cable used weighs 0.5 pounds per foot?
foot-pounds.

Expert Solution

milcah answered 2 years ago

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