Author Question: Why does it hurt more to fall from a certain height to the ground than it does to fall from the same ... (Read 97 times)

haleyc112 · **on:** Jul 29, 2018

Why does it hurt more to fall from a certain height to the ground than it does to fall from the same height into a swimming pool?

What will be an ideal response?

Question 2

A beam of white light of a certain frequency is incident on a metal surface. If the work function of this surface is 2.20 eV, what frequency of light would give a maximum kinetic energy of 0.25 eV to the photoelectrons ejected from this surface?

A) 2.05 1014 Hz
B) 1.02 1014 Hz
C) 2.50 1014 Hz
D) 3.53 1014 Hz
E) 5.92 1014 Hz

owenfalvey · **Reply #1 on:** Jul 29, 2018

Answer to Question 1

You go much further into the water before coming to a stop, thus your acceleration is much smaller, and the force exerted by the water is much smaller than that exerted by the ground.

Answer to Question 2

E