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
hodyreva [135]
3 years ago
12

Catching a wave, a 77 kg surfer starts with a speed of 1.3 m/s, drops through a height of 1.65 m, and ends with a speed of 8.2 m

/s. How much non-conservative work was done on the surfer?
Physics
1 answer:
Ronch [10]3 years ago
8 0

Answer:

Explanation:

The total work done by the wave is expressed as;

Workdone = Potential energy + Kinetic energy

Workdone = mgh + 1/2mv²

m is the mass = 77kg

g is the acceleration due to gravity = 9.8m/s²

v is the velocity = 8.2m/s

h is the height = 1.65m

Substitute into the formula;

Workdone = 77(9.8)(1.65) + 1/2(77)8.2²

Workdone = 1245.09 + 2588.74

Workdone = 3833.83Joules

Hence the amount of non conservative work done on the sofa is 3833.83Joules

You might be interested in
Explain the relationship between mass volume and density
IrinaK [193]
Mass is a body of matter of indefinite shape and considerable size. Density is the degree to which something is filled.  Check this website for more a better understanding : <span>www.answers.com/Q/What_is_the_relationship_between_density_and_volume</span>
8 0
3 years ago
A 0.l ‑kilogram block is attached to an initially unstretched spring of force constant k = 40 N/m as shown right. The block is d
GalinKa [24]

Answer:

The maximum potential energy of the system is 0.2 J

Explanation:

Hi there!

When the spring is stretched, it acquires potential energy. When released, the potential energy is converted into kinetic energy. If there is no friction nor any dissipative forces, all the potential energy will be converted into kinetic energy according to the energy conservation theorem.

The equation of elastic potential energy (EPE) is the following:

EPE = 1/2 · k · x²

Where:

k = spring constant.

x = stretching distance.

The elastic potential energy is maximum when the block has no kinetic energy, just before releasing it.

Then:

EPE = 1/2 · 40 N/m · (0.1 m)²

EPE = 0.2 J

The maximum potential energy of the system is 0.2 J

8 0
3 years ago
What is x-rays ? and how it's formed ?​
tia_tia [17]

X - rays are highly penetrating electromagnetic radiations that are formed when the cathode rays strikes a dense metal.

It has many characteristics such as :

  • bears no charge.

  • travels with the speed of light.

  • can ionize gases.
3 0
2 years ago
1. An object with a mass of m is thrown straight up near the surface of the earth. While the object is going up, the net force o
Vaselesa [24]

Answer:

C: equal to mg

Explanation:

in free-fall, gravity is always the net force on an object

5 0
3 years ago
A net force of 24 N is acting on a 4.0-kg object. Find the acceleration in m/s2.
Inessa [10]

Hi there!

We can use Newton's Second Law:
\Sigma F = ma

ΣF = Net force (N)
m = mass (kg)
a = acceleration (m/s²)

We can rearrange the equation to solve for the acceleration.

a = \frac{\Sigma F}{m}\\\\a = \frac{24}{4} = \boxed{6 \frac{m}{s^2}}

6 0
2 years ago
Other questions:
  • If an object absorbs all colors but red, we see
    10·1 answer
  • Think back to the example in the Warm-Up: A business owner wants to open a restaurant, but many residents do not want a business
    7·1 answer
  • Are my answers correct?
    7·1 answer
  • Lithium has 3 protons. how many neutrons are in the isotope lithium -8
    15·2 answers
  • The air you breathe is made of 21% oxygen and 78% nitrogen. The oxygen in air is the _____ and the nitrogen is the _____. soluti
    15·1 answer
  • A 30%-efficient car engine accelerates the 1300 kg car from rest to 10 m/s . How much energy is transferred to the engine by bur
    10·1 answer
  • Whose data did Kepler use to construct the laws of planetary motion?
    10·1 answer
  • Do Number 8<br> Please respond fast<br> WILL MARK BRAINLIEST<br> (THIS INVOLVES INCLINED PLANES)
    12·1 answer
  • 2.
    10·1 answer
  • A block of mass M is attached to a spring of negligible mass and can slide on a horizontal surface along the x-direction, as sho
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!