Aball is dropped off a very tall canyon ledge. gravity accelerates the ball at 14.8 m/s2. how fast is the ball traveling after 5 seconds?

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Which of the following are guidelines to follow for obtaining accurate observations