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3 years ago

In a lever, the effort arm is two times as long as the load arm. The resultant force will be

Physics

2 answers:

Setler [38]3 years ago

7 0

The resultant force will be twice the applied force.

In a lever, the total distance from the applied force to the fulcrum is the effort arm. And, the distance between load and the fulcrum is the load arm.

When the effort arm is two times the load arm, it means the resultant force will be twice the applied force.

Because, Force = displacement × speed

steposvetlana [31]3 years ago

4 0

The work done by the load arm and the effort arm is the same. If the applied force is f and the length of the effort arm is 2x, the work done by the effort arm is f × 2x. Similarly, the work done by the load arm is F · x. So, F = 2f. Since the effort arm is twice the length of the load arm, the resultant force will be twice the applied force.

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The atoms ,molecules,or compound present at the start of a chemical reaction that parcitipate in the reaction . which part of a

Tomtit [17]

Answer:

The atoms ,molecules, or compound present at the start of a chemical reaction that parcitipate in the reaction are the reactants.

Explanation:

The chemical reaction is the way in which one substance reacts against another. So, a chemical reaction consists of the transformation of some substances into others, that is, the process of arranging atoms and bonds when chemical substances come into contact.

In a chemical reaction, the initial substances are called reactants, while the new substances obtained are called products.

So, the atoms ,molecules, or compound present at the start of a chemical reaction that parcitipate in the reaction are the reactants.

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4 years ago

A ball is dropped , find the velocity after 100 m

Marat540 [252]

Answer:

Vf = 44.27 m/s

Explanation:

When a ball is dropped it is acted upon by gravitational force under free fall motion. So, in order to find its final speed we use 2rd equation of motion, as follows:

2gh = Vf² - Vi²

where,

g = acceleration due to gravity = 9.8 m/s²

h = height lost = 100 m

Vf = Final Velocity = ?

Vi = Initial velocity = 0 m/s (Since, ball starts from rest)

Therefore,

(2)(9.8 m/s²)(100 m) = Vf² - (0 m/s)²

Vf = √(1960 m²/s²)

Vf = 44.27 m/s

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3 years ago

What is the difference between a molecular formula and a molecular model

Anon25 [30]

The difference is one is a written formula that describes a molecule, the other is a visual representation of the molecule. for example the hydrocarbon butane has a molecular formula of C4H10, whereas the molecular model would depict 4 Carbon atoms (either represented by colour coded dots or the letter C) with single bonds (one straight line) connecting them to the 10 Hydrogen atoms (either differenly coloured dots or a H)

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4 years ago

When forces acting on an object are __________, the object's motion is constant.

Ivanshal [37]

The correct answer Is B-balanced

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3 years ago

Read 2 more answers

Is it a must that a nucleus must have opposite nature with the electron

Crazy boy [7]

Generally, the nucleus of an atom has a positive CHARGE because of the protons (not sure what you mean by nature) which helps attract the electrons the nucleus but it stays within it's electron cloud.

It cannot have the same charges as electrons (being negative) as the electrons would be repelled and the atom would lose it's structure.

I hope this answers the question.

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3 years ago