Explan why someone who doesn't support the Big Bang Theory might mention Blueshft Golexies n then argument aganst the theory
Solved
Show answers
More tips
- G Goods and services What Are the Most Popular Services?...
- P Philosophy How did the concept of module arise in computer science?...
- D Dating, Love, Relationships Why Should the Man be Active and the Woman Passive during Foreplay?...
- S Society and Politics Выборы: Смысл, Значение и Отражение...
- B Business and Finance How to Get Your Money Back When Lending? Top 7 Ways...
- F Family and Home Do Lullabies Help Babies Sleep or Is it Just a Myth?...
- F Family and Home Why Does God Punish Us Constantly and How Can We Fix It?...
- D Dating, Love, Relationships Why do we feel shame?...
- S Society and Politics How Could Nobody Know About the Dead Mountaineers?...
- O Other How to Accidentally Get a Rare Coin with Your Change and How to Know Its Value?...
Answers on questions: Physics
- M Mathematics 40⋅8−10^2= ? WHAT DO ANYONE KNOW THIS ANSWER. ORDER OF OPERATIONS...
- M Mathematics Ginger takes 10 nickels to buy some pencils at the school store. how many cents does ginger have to spend ?...
- G Geography At one point, both yooks and the zooks come up with the same contraption. How do you think that happened? What does this tells you about both sides?...
- C Chemistry Lichen is an example of a: A. pioneer species B. consumer C. primary species D. parasite...
Ответ:
Net force = 0
Explanation:
Short if the middle book is not acceleration in any direction, the net force is zero.
Long refer to the attached free-body diagram (FBD) to see why the net force is zero. Skills to draw FBD are essential in solving problems in statics.
Top book exerts -mg (downwards) on the middle book.
Middle book exerts -mg (downwards) on the bottom book.
Total downward force is -mg-mg = -2mg
By Newton's third law, when an object is not in motion, reaction equals action of -2mg in the opposite direction, therefore the reaction (upwards) is +2mg.
This makes the net force of -2mg (downwards) + 2mg (upwards) =0