Which combination of shooters and ducks had the greatest potential energy before impact ?

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves