Sam walks to his neighborhood park to play on the swing set. He sits on a swing that is 0.60 meters above the ground and begins swinging. Sam weighs 38 kilograms and is moving at 2.8 meters per second at the bottom of each swing. How much kinetic energy does Sam have at the bottom of each swing? Assume that acceleration due to gravity is 10 m/s2. A. 149 joules B. 228 joules C. 298 joules D. 53 joules

Aremote community desperately needs more electrical energy. it is located in an area with the following characteristics: average wind speed of 15 – 20 km/hr some medium-sized rivers with slow-moving currents few coal deposits some oil exploration being conducted within 400 miles based on the above information, which energy source would be the most economical and safest for the community to pursue? a. fossil fuel b. hydroelectric c. nuclear d. wind