Askydiver jumps out of a helicopter and falls freely for 5.6 s before opening the parachute. (a) what is the skydiver's downward velocity when the parachute opens? correct: your answer is correct. m/s (b) how far below the helicopter is the skydiver when the parachute opens? incorrect: your answer is incorrect. m

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?