Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her ...

Author Question: Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her ... (Read 59 times)

neverstopbelieb

Hero Member
Posts: 534

on: Jul 28, 2018

Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her descent down a frictionless slide. If they both start at the same height above the ground, which of the following is true about their kinetic energies as they reach the ground?
1.Bob's kinetic energy is greater than Esther's.
2.Esthers kinetic energy is greater than Bob's.
3.They have the same kinetic energy.
4.The answer depends on the shape of the slide.

Question 2

Three identical balls are thrown from the top of a building, all with the same initial speed. The first ball is thrown horizontally, the second at some angle above the horizontal, and the third at some angle below the horizontal as in the figure below. Neglect air resistance, rank the speeds of the balls as they reach the ground, from fastest to slowest.

scikid

Sr. Member
Posts: 300

Reply #1 on: Jul 28, 2018

Answer to Question 1

3

Answer to Question 2

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neverstopbelieb

Hero Member
Posts: 534

Reply #2 on: Jul 28, 2018

Both answers were spot on, thank you once again

scikid

Sr. Member
Posts: 300

Reply #3 on: Jul 28, 2018

Great! Please up vote

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