Accelerationdue to gravity​

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

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

Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?