1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GREYUIT [131]
3 years ago
14

15. A volleyball player who weighs 650 Newtons jumps 0.500 meters vertically off the floor. What is her kinetic energy just befo

re hitting the floor?
Physics
1 answer:
allochka39001 [22]3 years ago
3 0
<h2>Kinetic energy just before hitting the floor is 324.57 J</h2>

Explanation:

Weight of volleyball player = 650 N

That is

            Mass x Acceleration due to gravity = 650

            Mass x 9.81 = 650

            Mass = 66.26 kg

We also have equation of motion v² = u² + 2as

Initial velocity, u = 0 m/s  

Acceleration, a = 9.81 m/s²  

Final velocity, v = ?

Displacement, s = 0.5 m

Substituting  

v² = u² + 2as

v² = 0² + 2 x 9.81 x 0.5

v = 3.13 m/s

Velocity with which he lands on ground is 3.13 m/s

We have kinetic energy = 0.5 x Mass x Velocity²

Substituting

          Kinetic energy = 0.5 x 66.26 x 3.13²

           Kinetic energy = 324.57 J

Kinetic energy just before hitting the floor is 324.57 J

You might be interested in
Complete the statement below with the correct term.
dimaraw [331]
Two or three i believe to be the answer
7 0
3 years ago
Read 2 more answers
What is the final temperature of 0.5 kg of water initially at 18 °C after 65 kJ of
goldenfox [79]
A is the answe for the final temperatures
8 0
3 years ago
Read 2 more answers
Which best describes a characteristic of an adiabatic process?
neonofarm [45]

Answer:

<h3>Can you please provide the choices? For now this is all I can give you.</h3>

Explanation:

In thermodynamics, an adiabatic process is a type of thermodynamic process which occurs without transferring heat or mass between the system and its surroundings.Unlike an isothermal process, an adiabatic process transfers energy to the surroundings only as work. It also conceptually supports the theory used to explain the first law of thermodynamics and is therefore a key thermodynamic concept.

5 0
3 years ago
Read 2 more answers
A fireman is sliding down a fire pole. As he speeds up, he tightens his grip on the pole, thus increasing the vertical frictiona
Andrei [34K]

Answer:

The fireman will continue to descend, but with a constant speed.

Explanation:

In kinetic friction <em>(which is the case discussed here) </em>since the fireman is already in motion because of a certain force, once the frictional force matches the normal force, the fireman will stop accelerating and continue moving at a constant rate with the original speed he had. We will need a force greater than the normal force acting on the fireman to cause a deceleration.

We need to understand the difference between static friction and kinetic friction.

Static friction occurs in objects that are stationary, while kinetic friction occurs in objects that are already in motion.  

In static friction, when the frictional force matches the weight or normal force of the object, the object remains stationary.

While in kinetic friction, when the frictional force matches the normal force, the object will stop accelerating. This is the case of the fireman sliding down the pole as discussed above.

8 0
3 years ago
What direction does the medium vibrate
slega [8]

a direction perpendicular to the direction of propagation of the wave, it is called a transverse wave.

7 0
3 years ago
Read 2 more answers
Other questions:
  • A spherical balloon is 40 ft in diameter and surrounded by air at 60°F and 29.92 in Hg abs.(a) If the balloon is filled with hyd
    6·2 answers
  • How many gallons of water per day does the average American family of 4 use?
    13·2 answers
  • Please select the word from the list that best fits the definition. The movement of a magnetic pole away from the actual pole
    13·1 answer
  • Can an object exert a force on itself?
    6·1 answer
  • 7. The first American to go into outer space was a monkey.<br> a. True<br> b. False
    13·2 answers
  • A ferris wheel car with a mass of 350 kg, travels in a
    10·1 answer
  • If you dropped a ball from a height of 10 m and measured its distance to the ground every 0.1 s, what would the graph of positio
    8·1 answer
  • If a bicyclist has a mass of 70 KG and a velocity of 25M/S, what is the momentum of the bicyclist?
    5·1 answer
  • Particle A of charge 3.06 10-4 C is at the origin, particle B of charge -5.70 10-4 C is at (4.00 m, 0), and particle C of charge
    6·1 answer
  • What happens when ice melts, according to the kinetic theory?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!