Which example provides a complete scientific description of an object in motion? a. the tiger had to run at 50 km across the field to catch the zebra. b. the hockey player sent the puck flying toward the north go to score of the winning point. c. the hiker followed the north trail a distance of two km in thirty min. d. the vibration of the jackhammer broke through the south facing rock in under 10 seconds.

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