The st. louis arch has a height of 192 m. suppose that a stunt woman of mass 84 kg jumps off the top of the arch with an elastic band attached to her feet. she reaches the ground at zero speed. the acceleration of gravity is 9.81 m/s 2 . find her kinetic energy after 2.6 s of the flight. assume the elastic band has no length and obeys hooke’s law. answer in units of kj

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

Why do astronauts in the space shuttle weigh less?