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Llana [10]
3 years ago
15

Which graph BEST represents the relationship between the potential energy and kinetic energy of a cannon ball as it flies over t

he
bow of a ship and then falls onto the beach on the other side? Note that the dotted line represents potential energy while the solid
line represents kinetic energy
Physics
1 answer:
nexus9112 [7]3 years ago
6 0

Answer:C

Explanation:I think sorry if it’s wrong

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An object is placed 60 cm in front of a concave mirror whose focal length is 20 cm. What is
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How do I find the magnitude of the net force acting on the box
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Answer:

20 N

Explanation:

<em>Newton's second Law of motion</em> law states that If there is a external force acting on an object. Then the rate of change of momentum of  that object is directly proportional to the force acting on its.

  • the net force acting upon the object  <em>(F)</em>
  • the mass of the object. <em>(m)</em>
  • <em>V </em>Final velocity of the object
  • U initial velocity of the object
  • mV -Final momentum of the object
  • mU - Initial momentum of the object

Due to momentum change of that object, momentum change. We can write the equation bellow this,

F = (mV-mU)/t

When m is constant we can write the above expression like this,

F = m (V-U)/t

There for

(V-U)/t  =  a ( Rate of change of velocity can be denoted as acceleration )

F = m× a

we can state this in mathematically,

a = F/m

in another representation

F = m*a

Net Force = mass*acceleration

                 = 10 * 2

                 = 20 N

object is subjected to a negative acceleration due to the friction.

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3 years ago
What is the number at the end of an isotope’s name?
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Explanation:

The liquid contains only one element. -The liquid is a pure substance. The number at the end of an isotope's name is the -mass number. While looking at xenon (Xe) on the periodic table, a student needs to find an element with a smaller atomic mass in the same group.

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3 years ago
9.5 g bullet has a speed of 1.5 km/s what is the kinetic energy of the bullet
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The answer is  0.000824653J

You need to use the formula Mass * Velocity^2 over 2


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3 years ago
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An iron block of mass 10 kg rests on a wooden plane inclined at 30° to the horizontal. It is found
Kaylis [27]

I assume the 100 N force is a pulling force directed up the incline.

The net forces on the block acting parallel and perpendicular to the incline are

∑ F[para] = 100 N - F[friction] = 0

∑ F[perp] = F[normal] - mg cos(30°) = 0

The friction in this case is the maximum static friction - the block is held at rest by static friction, and a minimum 100 N force is required to get the block to start sliding up the incline.

Then

F[friction] = 100 N

F[normal] = mg cos(30°) = (10 kg) (9.8 m/s²) cos(30°) ≈ 84.9 N

If µ is the coefficient of static friction, then

F[friction] = µ F[normal]

⇒   µ = (100 N) / (84.9 N) ≈ 1.2

5 0
2 years ago
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