evelyn49477 evelyn49477
  • 03-02-2021
  • Physics
contestada

A 3kg book falls from a 2m tall bookshelf what is the speed

PICTURE included

A 3kg book falls from a 2m tall bookshelf what is the speed PICTURE included class=

Respuesta :

cairde
cairde cairde
  • 03-02-2021

Answer:

39.2m/s

Explanation:

The potential energy the book has right before it falls is equal to the kinetic energy in falling.

PE = KE

mgh = (1/2)mv

2gh=v

v=(2)(9.81)(2)

v=39.24m/s

Answer Link

Otras preguntas

How many electrons are in a carbon 13 (13c) atom?
How to convert 0.39 into a fraction?
Your uncle is planting an 8-foot tall tree. He ties support wires to the tree, 1 foot from the top, and ties them to posts on the ground, 4 feet from the trunk
What is a federal scout
a meter stick casts a shadow 1.4 m long at the same time a flagpole casts a shadow 7.7 m long. The triangle formed by the meterstick and its shadow is similar t
Which term describes the example below? A child with a widow’s peak has a mother who is homozygous dominant for a widow’s peak and a father who is homozygous do
How was society organized in the Middle Ages?
How do you solve x²-10x+9=0 by completing the square?
a bicycle wheel travels about 82 inches in 1 full rotation. What is the diameter of the wheel, to the nearest inch? (use 3.14 for pi)
Which decimal is equal to 7/10?A. 0.71B. 0.7C. 0.07D. 0.071