A 2-kg object is moving horizontally across a frictionless surface with a speed of 4 m/s. How much force is required to keep the object moving at this speed and in this direction?

Which best describes the difference between internal and thermal energy?

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

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero