Part a: What is the velocity of an object that moves from 76 m to 66 m in 11 s?
Express your answer to three significant figures and include the appropriate units.

Part b:
What is the speed of an object that moves from 76m to 66m in 11s ?

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600