1. A bos of mass 4.0 kg is accelerated from rest by a force across a floor at a rate of 2.0 m/s 2 for 7.0 s. Find the net work done on the box.
2. An 85- g arrow is fired from a bow whose string exerts an average force of 105 N on the arrow over a distance of 75 cm. What is the speed of the arrow as it leaves the bow? the answer is 43 m/s please solve
3. A spring has a spring constant k of 88.0 N/m. How much must this spring be compressed to store 45.0J of potential energy?