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garik1379 [7]
3 years ago
5

Ideal mechanical advantage is equal to the displacement of the effort force divided by the displacement of the load.

Physics
1 answer:
ELEN [110]3 years ago
3 0
This would be false. hope this helps. good luck :)
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Cual es la importancia de movimiento en la sociedad?
Marta_Voda [28]

Answer:

It allows for transportation and other things

Explanation:

Why are you asking this on the physics section

5 0
3 years ago
A child jumps from a moving sled with a speed of 2.2 m/s and in the
butalik [34]

The initial velocity of the sled will be 7.34 m/sec. V is the initial velocity of the sled.

<h3>What is the law of conservation of momentum?</h3>

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

The given data in the problem is;

(m₁)  mass of child = 38 kg

(u₁) is the initial velocity child = 2.2 m/s

(m₂) is the mass of sled = 68 kg

(u₂) is the initial velocity of sled = ?

(v) is the velocity after collision = 5.5 m/s

According to the law of conservation of momentum;

Momentum before collision =Momentum after collision

\rm  m_1u_1 + m_2u_2 = v(m_1 + m_2)\\\\(38 \times  2.2) + (68 \times V) = 5.5 \times (38+68) \\\\ 83.6 + 68V = 5.5 \times 106 \\\\  83.6 + 68V =583 \\\\ \rm 68\ V= 583 -83.6 \\\\ \rm 68 \ V= 499.4\\\\ V= 7.34 \ m/sec

Hence,the initial velocity of the sled will be 7.34 m/sec.

To learn more about the law of conservation of momentum refer;

brainly.com/question/1113396

#SPJ1

4 0
2 years ago
Common transparent tape becomes charged when pulled from a dispenser. If one piece is placed above another, the repulsive force
liraira [26]

Answer:

Explanation:

Let the equal charges be Q .

Force between charges = k Q² / R where R is distance between charges , k = 9 x 10⁹.

Putting the charges

Force F = 9 x 10⁹ x Q² /( .72 x 10⁻²)²

= 17.36 x 10¹³ Q² N

This force equals weight so

17.36 x 10¹³ Q² = 15.7 x 10⁻³

Q² = .90 x 10⁻¹⁶

Q = .95 x 10⁻⁸

= 9.5 x 10⁻⁹

= 9.5 nC.

8 0
3 years ago
g A projectile of mass 3 kg is launched horizontally from an initial height 3 m with an initial velocity 10 m/s. This velocity i
Ierofanga [76]

Answer:

The kinetic energy at ground will be "238.2 J".

Explanation:

The given values are:

mass,

m = 3 kg

Initial height,

h = 3 m

Initial velocity,

v = 10 m/s

By using the conservation of energy at points A and B,

⇒  E_A=E_B

⇒  mgh+\frac{1}{2}mv^2=k_B

On substituting the values, we get

⇒  3\times 9.8\times 3+\frac{1}{2}\times 3\times (10)^2=k_B

⇒             88.2+0.5\times 3\times 100=k_B

⇒                            88.2+150=k_B

⇒                                    238.2 =k_B

8 0
3 years ago
How did the failure of the League of nations lead to the rise of dictatorship ?
kenny6666 [7]

Answer:

Failure of League of Nations became a cause for the rise of dictatorship because after the first world war the league of nations was established to maintain peace in the world and to prevent wars but it proved weak and failed to achieve its aims.

Explanation:

6 0
3 years ago
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