A 75 kg person gets into an elevator at the lobby level of a hotel together with his 35 kg suitcase and gets out at the 10th floor which is 30 m above the lobby. Determine: a. The amount of energy consumed by the motor of the elevator that is now stored in the suitcase on the 10th floor. b. I the travel from the lobby to the 10th floor took 15 seconds, the weight of the elevator is 220 lbf, and the elevator passenger compartment travels at constant velocity as it is being pulled by a cable, determine the work, in J, and the power needed, in kW.

The process in which the nucleus of an atom splits into two lighter atoms, releasing a large amount of energy is nuclear

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?