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daser333 [38]
3 years ago
5

A rock climber weighs 550N and is carrying a backpack that weighs 50N. How much total work has been done after she climbs 12M

Physics
1 answer:
kherson [118]3 years ago
4 0

Answer:

7200 J

Explanation:

Work = force × distance

W = (550 N + 50 N) × (12 m)

W = 7200 J

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A projectile is launched with a horizontal velocity of 20 m/s and an initial vertical velocity of 20 m/s. What is the projectile
cestrela7 [59]

Answer:

Vertical acceleration 9.8 m/s² downward

Horizontal acceleration 0.0 m/s²

assuming no air resistance.

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As scientists learn more what happens to scientific ideas?
blsea [12.9K]
They could change but most likely not
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If the electron is initially in the ground level, E1=0.625E[infinity]E1=0.625E[infinity], and absorbs a photon, what maximum wav
tekilochka [14]

Answer:

 λ = 3.1824 10-25 m

Explanation:

To release the electron from the power well the absorbed photon electro must be greater than or equal to the energy of the electron in the power well

           

The photon energy is E_photon = 0.625 J

The speed of light is

       c = λ f

         

Let's use Planck's equation

        E = h f

             

We substitute

       E = h c / λ

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        λ = 6.63 10-34 3 108 / 0.625

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4 0
3 years ago
Cart 1 has a mass of 1 kg. Cart 2 has a mass of 2 kg. They are pushed apart by a spring. The spring exerts 2N of force into cart
almond37 [142]

The force exerted on the cart 2 during the collision is 2 N.

The given parameters:

  • <em>Mass of cart 1 = m1 = 1 kg</em>
  • <em>Mass of cart 2 = m2 = 2kg</em>
  • <em>Force applied on cart 1 = 2 N</em>

According to Newton's third law of motion, action and reaction are equal and opposite. The force exerted on cart 1 is equal in magnitude to the force exerted on cart 2 but in opposite direction.

F_1 = -F_2

F_2 = -F_1\\\\F_2 = -2 \ N\\\\|F_2| = 2 \ N

Thus, the force exerted on the cart 2 during the collision is 2 N.

Learn more about Newton's third law of motion here: brainly.com/question/13874955

5 0
2 years ago
Newton’s first law states that if an objects velocity is changing a _____ must be acting on it.
klio [65]
<h3>Answer: </h3>

(a)

<h3>Explanation </h3>
  • Newtons First Law can be written as the formula

f = ma

since acceleration is the changing of velocity as its formula is

\frac{v2 - v1}{t}

Thus, a force must be acting on an accelerating/decelerating object

  • It is not mass as the mass does not act on the object but rather the mass is acting on the surface of the ground.

  • Changing velocity is already acceleration

  • inertia is the term used to describe Newtons first law

6 0
3 years ago
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