Sign In
Ask Question
Physics
Alvaro Mckinney
20 April, 03:26
If the sign of work is negative,
+2
Answers (
1
)
Mya Schwartz
20 April, 06:45
0
If the sign of work is negative, that means the force and the motion are in opposite directions.
Let's say you see something roll off of the shelf. You catch it, and you let it down slowly and gently.
Gravity exerted down-force on it and it moved down. Gravity did positive work on it.
YOU exerted UP-force on it and it moved down. YOU did negative work on it.
(Also, the falling object exerted down-force on your hand, and your hand moved down. The falling object did positive work on your hand! Where did THAT energy come from? It came from the potential energy that the object had while it was on the shelf. Your hand absorbed that energy on the way down, doing negative work. So the object didn't have any kinetic energy when it reached the floor, and it did NOT splinter the floor or shatter in smithereens. It had barely enough energy left to make a sound when it hit the floor.)
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Get an answer to your question ✅
“If the sign of work is negative, ...”
in 📙 Physics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
Besides gravity, what other factors, if any, hold us to the Earths surface?
Answers (2)
A 52.0 kg skateboarder does a trick on a half-pipe. During the trick, he reaches a speed of 8.90 m/s. The radius of the half-pipe ramp is 3.00 meters. What is the minimum centripetal force necessary to keep the skater on the ramp?
Answers (1)
Which sentence best explains why ocean water beat the equator is warmer than the ocean water far from the equator
Answers (1)
Which of the following energy sources is NOT a type of coal or coal-precursor? Peat Petroleum Lignite Anthracite
Answers (1)
Which of the following situations is impossible a) a body having velocity east and acceleration west b) a body having velocity east and acceleration east c) a body having zero velocity but non-zero acceleration d) a body having constant velocity but
Answers (1)
New Questions in Physics
A six - sided number cube is labeled with the number 1-6, one number on each face. Each number is used exactly once. How many possible outcomes exist when the cube is rolled two times
Answers (1)
What will happen to an electromagnet of the electric current is lost?
Answers (1)
How can velocity be used to calculate for an unknown distance? (Logically)
Answers (1)
A rod made from insulating material carries a net charge, while a copper sphere is neutral. The rod and the sphere do not touch. Is it possible for the rod and the sphere to (a) attract one another and (b) repel one another? Explain.
Answers (1)
Which of the following best explains why mutations cannot cause evolution?
No Answers
Home
»
Physics
» If the sign of work is negative,
Sign In
Sign Up
Forgot Password?