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Mademuasel [1]
3 years ago
14

Which of the following force pairs are an example of Newton's 3rd Law? Select all that apply.

Physics
1 answer:
Savatey [412]3 years ago
5 0

The bat hits the baseball forward. The baseball hits the bat backwards.

The bee hits the windshield northward./The windshield hits the bee southward

Explanation:

Newton's third law states that:

"When an object A exerts a force (called action) on an object B, then object B exerts an equal and opposite force (called reaction) on object A"

It is important to note that the action force and the reaction forces act on the same pair of objects.

Let's now analyze each case:

- The earth pulls down on the chair./The ground pushes up on the chair.  --> NO. The correct pair would be: The earth pulls down on the chair / the chair pulls up on the earth (in fact, the chair exerts a gravitational force on the Earth as well, pulling upward)

- The bat hits the baseball forward. The baseball hits the bat backwards.  --> TRUE. This is an example of action/reaction force pair.

- The boy pushes rightward on the box./Friction resists the motion leftward on the box.  --> FALSE. The correct pair would be: The boy pushes rightward on the box / the box pushes leftward on the boy

- The bee hits the windshield northward./The windshield hits the bee southward.  --> TRUE. This is an example of action/reaction force pair.

The rope pulls the box upward./The earth pulls the box downward. --> FALSE. A correct pair would be: the rope pulls the box upward / the box pulls the rope downward.

Learn more about Newton's third law:

brainly.com/question/11411375

#LearnwithBrainly

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What two factors determine the force of gravity between two objects?
Yuki888 [10]

Answer:

Mass and distance between them are two factors on which force of gravity depends

Explanation:

According to law of gravitation

Gravitational force between two object is given by F=\frac{Gm_1m_2}{r^2}, here G is gravitational constant m_1\ and\ m_2 are mass of the objects and r is distance between them

From the relation we can see that force of gravity is dependent on the mass of the objects and distance between them.

So mass and distance between them are two factors on which force of gravity depends

5 0
3 years ago
A Rac variant, in which the residue at position 61 was replaced with an alanine (Rac61A), was synthesized. Wild-type Rac and Rac
ludmilkaskok [199]

Answer:

Ammonia, (NH_{3})

Explanation:

If a Rac variant, in which the residue at position 61 was replaced with an alanine (Rac-61A), was synthesized. Also, Wild-type Rac and Rac-61A were incubated separately with VopC.

In order to obtain data to support that VopC modifies Rac at residue 61, the samples should be analyzed for the presence of Ammonia (NH_{3}[\tex]) compound.In chemistry, the Vanadyl Phthalocyanine (VopC) comprises of a catalytic domain that activates host cells GTPase Rac irreversibly, through the deamide side chain of the residue existing at position 61.Also, we know that a deamidation reaction gives off Ammonia, [tex](NH_{3}) and as such when ammonia is present in the sample containing Wild-type Rac but not in Rac-61A, this simply proves or provide the data to support that VopC modifies Rac at residue 61.

<em>Additionally, deamidation can be defined as the chemical conversion (hydrolysis) of an amide functional group such as glutamine, asparagine, in a polypeptide to another functional group such as glutamic acid or isoaspartic acid respectively by treating it with a strong acid (deamidate, transamidase). </em>

3 0
2 years ago
A 20 kg truck drives in a circle of radius 4 m at 10m/s. What causes
jek_recluse [69]

Answer:

Normal force

Explanation:

  • The force is centipetral force

Calculating :-

  • Mass=m=20kg
  • Radius=r=4m
  • Velocity=10m/s=v

We know

\boxed{\sf F_c=\dfrac{mv^2}{r}}

\\ \sf\longmapsto F_c=\dfrac{20(10)^2}{4}

\\ \sf\longmapsto F_c=\dfrac{20(100)}{4}

\\ \sf\longmapsto F_c=\dfrac{2000}{4}

\\ \sf\longmapsto F_c=500N

6 0
2 years ago
A spring (70 N/m ) has an equilibrium length of 1.00 m. The spring is compressed to a length of 0.50 m and a mass of 2.0 kg is p
madreJ [45]

Answer:

Part a)

L = 0.68 m

Part b)

L = 0.63 m

Explanation:

Part a)

As we know that there is no friction in the path

So here we can use energy conservation to find the distance moved by the mass

Initial spring energy = final gravitational potential energy

so we will have

\frac{1}{2}kx^2 = mgL sin\theta

\frac{1}{2}70(0.5)^2 = 2(9.81)(L) sin41

8.75 = 12.87 L

L = 0.68 m

Part b)

Now if spring is connected to the block then again we can use energy conservation

so we will have

\frac{1}{2}kx^2 = mg(x + x')sin\theta + \frac{1}{2}kx'^2

so we will have

\frac{1}{2}(70)(0.5^2) = 2(9.81) (0.50 + x') sin41 + \frac{1}{2}(70)x'^2

8.75 = 6.43 + 12.87 x' + 35 x'^2

x' = 0.13 m

so total distance moved upwards is

L = 0.5 + 0.13 = 0.63 m

8 0
3 years ago
Give an example of a genotype for a person with brown hair. (brown is dominant)
nirvana33 [79]

Answer:

Bb can be an example

Explanation:

That is Because brown is dominated, so it is in Capital.

8 0
3 years ago
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