Alice drops a rock to a well. She hears the splash of the rock 4. 1s later. The speed of sound is 340m/s. How deep is the well?.

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

In automobile steering wheel is shown what is the ideal mechanical advantage blank? if the ama is eight what is the efficiency of the steering wheel?

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)