Author Question: Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her ... (Read 44 times)

neverstopbelieb

  • Hero Member
  • *****
  • Posts: 534
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
Answer to Question 1

3

Answer to Question 2




Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

neverstopbelieb

  • Hero Member
  • *****
  • Posts: 534
Both answers were spot on, thank you once again



scikid

  • Sr. Member
  • ****
  • Posts: 300

 

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

For a complete list of videos, visit our video library