In a flight a rocket is subjected to four forces: weight, thrust, lift, and drag. Forces are vector quantities that have both a magnitude and a direction. Imagine that the rocket is about to lift off the launch pad. According to Newton's third law of motion what force is critical to the success of its upward motion?

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