A rock falls 30 m. Its KE before it strikes the ground is 4,392 J. What is the
mass of the rock?
A. 15 kg
B. 146 kg
C. 1.5 kg
D. 3.0 kg
Solved
Show answers
More tips
- C Cities and Countries How to Easily and Quickly Obtain a Schengen Visa?...
- F Food and Cooking Red Caviar: How to Choose the Best?...
- C Computers and Internet Clearing Cache: How to Speed Up Your Browser...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Physics
- E English HEEEEELP ME IVE BEEN ON THIS FOR WAY TO LONG...
- M Mathematics 1. Set up the problem; do not calculate. Suppose you deposit $750 at the beginning of 2017 into a savings account that pays a simple interest rate of 2.8%. How much...
- M Mathematics Select all the factors of: 3x^2+23x+30A) (x+3)B) (3x+10)C) (x+6)D) (3x+5)E) (3x+3)F)3...
Ответ:
A,about 15kg.
Explanation:
PE=KE
mgh=1/2mv^2
m(9.81)(30)=4392
294.3m=4392
m=14.9235474
Ответ: