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serious [3.7K]
3 years ago
8

Which kind of energy transformation occurs during skydiving? A) mechanical to gravitational B) gravitational to kinetic C) kinet

ic to potential D) mechanical to potential
Physics
2 answers:
Aleks [24]3 years ago
7 0

B) gravitational to kinetic

Explanation:

The skydiver, when he is located at a certain height h above the ground, possesses gravitational potential energy, equal to:

U=mgh

where m is the mass of the skydiver, g is the gravitational acceleration and h is the height above the ground. As he falls, its height h decreases, while his speed v increases, so part of the gravitational potential energy is converted into kinetic energy, which is given by

K=\frac{1}{2}mv^2

so, we see that as v increases, the kinetic energy increases. Therefore the correct answer is

B) gravitational to kinetic

Roman55 [17]3 years ago
6 0

I believe the answer is B). Gravitational energy to kinetic.

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Determine the acceleration of a boat with a final speed of 120 m/s after 30 seconds.
Anuta_ua [19.1K]
V=u+at
120=0+a*30
120=30a
a=120/30
a=4 m/s²
6 0
2 years ago
Read 2 more answers
a 5.5 kg box is pushed across the lunch table.the net force applied to the box is 9.7 N.what is the acceleration of the box?
skelet666 [1.2K]

Answer:

1.76m/s²

Explanation:

Acceleration is the time rate of change in velocity of a body. It is a vector quantity that is it has both magnitude and direction

From newton's second law of motion which states that the rate of change of momentum of a body is proportional to the applied force which takes place in the direction of force applied.

This law gives a formula which relate force, mass and acceleration.

Force = mass x acceleration

Given that force = 9.7N , mass = 5.5kg

Since force(F)= mass(m) x acceleration(a)

Therefore F = ma

Divide both sides by m

F/m = ma/m

Therefore,

Acceleration (a)  = F/m

Acceleration = 9.7N ➗ 5.5kg

Acceleration = 1.76m/s²

The S. I unit of acceleration is m/s²

I hope this was helpful, Please mark as brainliest  

5 0
2 years ago
Static charges can be applied to neutral objects by friction, induction or conduction. What do all of these methods utilize to c
Oksana_A [137]
The s<span>tatic charges that are applied to neutral objects by friction, induction or conduction main utilise the creation of electrons or electric charges. Electrons flow forming a current into a specific medium known as a conductor which is mainly due to a significant potential difference between two points.</span>
3 0
3 years ago
Read 2 more answers
7. A child of mass m starts from rest and slides without friction from a height h along a curved waterslide (Fig. P5.46). She is
marissa [1.9K]

The mechanical energy of the girl will be conserved because the system is isolated and the initial potential energy will be equal to final kinetic energy.

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

The law of conservation of energy states that energy can neither be created nor destroyed but can be transformed from one form to another.

The change in the potential energy of the  launched from a height into the pool without friction from the given height h is calculated by applying the following kinematic equation.

ΔP.E = ΔK.E

where;

  • ΔP.E is change in potential energy of the child
  • ΔK.E is change in the kinetic energy of the child

mghf - mghi = ¹/₂mv²  - ¹/₂mu²

where;

  • m is the mass of the girl
  • g is acceleration due to gravity
  • hi is the initial height of the girl
  • hf is the final height when she is launched into the pool
  • u is the initial velocity
  • v is the final velocity of the girl

Thus, for every closed or isolated system such as this case, mechanical energy is always conserved because the initial potential energy of the girl will be converted into her final kinetic energy.

Learn more about conservation of mechanical energy here: brainly.com/question/332163

#SPJ1

4 0
1 year ago
How does the distance traveled by the coin compare to its displacement after ten flips?
Mkey [24]

Answer:

To calculate displacement, simply draw a vector from your starting point to your final position and solve for the length of this line. If your starting and ending position are the same, like your circular 5K route, then your displacement is 0. In physics, displacement is represented by Δs.

Explanation:

hope helps

5 0
2 years ago
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