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
cestrela7 [59]
3 years ago
11

Natasha weighs 530N. what is her kinetic energy as she swimsat

Physics
1 answer:
WITCHER [35]3 years ago
3 0

<u>Answer:</u> The kinetic energy of Natasha as she swim is 38.88 J

<u>Explanation:</u>

Force is defined as the mass multiplied by the acceleration of the object.

Mathematically,

F=m\times a

where,

F = weight of Natasha = 530 N

m = mass of Natasha = ?

a = acceleration due to gravity = 9.8m/s^2

Putting values in above equation, we get:

530kg.m/s^2=m\times 9.8m/s^2\\\\m=\frac{530}{9.8}=54kg

Speed is defined as the rate at which an object moves with respect to time.  To calculate the speed, we use the equation:

s=\frac{d}{t}

where,

d = distance traveled = 72 m

t = time taken by Natasha = 1.0 min = 60 sec   (Conversion factor:  1 min = 60 s)

Putting values in above equation, we get:

s=\frac{72}{60}=1.2m/s

Kinetic energy is defined as the energy which is possessed due to its motion.  It is also defined as the half of the product of mass of the object and square of the velocity of the object.

Mathematically,

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

where,

E_K = kinetic energy of Natasha

m = mass of the Natasha = 54 kg

v = velocity of Natasha = 1.2 m/s

Putting values in above equation, we get:

E_K=\frac{1}{2}\times 54\times (1.2)^2\\\\E_K=38.88J

Hence, the kinetic energy of Natasha as she swim is 38.88 J

You might be interested in
Consider a uniform horizontal wooden board that acts as a pedestrian bridge. The bridge has a mass of 300 kg and a length of 10
gayaneshka [121]

Answer:

F = 2123.33N

Explanation:

In order to calculate the torque applied by the left support, you take into account that the system is at equilibrium. Then, the resultant of the implied torques are zero.

\Sigma \tau=0

Next, you calculate the resultant of the torques around the right support, by taking into account that the torques are generated by the center of mass of the wooden, the person and the left support. Furthermore, you take into account that torques in a clockwise direction are negative and in counterclockwise are positive.

Then, you obtain the following formula:

-\tau_l+\tau_p+\tau_{cm}=0          (1)

τl: torque produced by the left support

τp: torque produced by the person

τcm: torque produced by the center of mass of the wooden

The torque is given by:

\tau=Fd           (2)

F: force applied

d: distance to the pivot of the torque, in this case, distance to the right support.

You replace the equation (2) into the equation (1) and take into account that the force applied by the person and the center of mass of the wood are the their weight:

-Fd_1+W_pd_2+W_{cm}d_3=0\\\\d_1=6.0m\\\\d_2=2.0m\\\\d_3=3.0m\\\\W_p=(200kg)(9.8m/s^2)=1960N\\\\W_{cm}=(300kg)(9.8m/s^2)=2940N

Where d1, d2 and d3 are distance to the right support.

You solve the equation for F and replace the values of the other parameters:

F=\frac{W_pd_2+W_d_3}{d_1}=\frac{(1960N)(2.0m)+(2940N)(3.0m)}{6.0m}\\\\F=2123.33N

The force applied by the left support is 2123.33 N

8 0
3 years ago
If a net force is greater than 0 Newtons, what is the force?
goldenfox [79]

Answer:disequilibrium

Explanation:

When the net force is not zero it is called disequilibrium

5 0
3 years ago
HELP! What are 5 changes that a fidget spinner can be?
noname [10]

Answer:

I would hope they can change this question

6 0
3 years ago
What is the best way to avoid overloading your boat
8_murik_8 [283]
Travel lightly and read your instructions manual.
6 0
3 years ago
Which situation would water evaporate faster from.quick help?!
Temka [501]
The last option in Puerto Rico where it’s sunny and 88°
3 0
3 years ago
Read 2 more answers
Other questions:
  • What is a boyfriend to you? And what age is appropriate to have one?
    12·2 answers
  • Give at least two examples where people commonly use temperature to control reaction rates.
    14·1 answer
  • In which of the following cases is work being done on an object? Question 2 options: Pushing against a locked door Carrying a bo
    12·1 answer
  • Calculate the heat flux (in W/m^2) through a sheet of a metal 14 mm thick if the temperatures at the two faces are 350 and 140°C
    15·1 answer
  • Trying out for the big leagues, you throw a 149 gram baseball at a speed of 85.0 miles per hour. What is the ball's kinetic ener
    12·1 answer
  • While practicing the trumpet you notice that every time you play a particular note a window in the room rattles. How can you exp
    8·1 answer
  • Explain the amount of chromosomes and gene combinations in a parent cell and offspring that result from meiosis and fertilizatio
    14·1 answer
  • What kind of exercise should you do when you're cooling down after an<br> intense workout?
    14·2 answers
  • A metal wire has a resistance of 13.00 at a temperature of 25.0 degree celsius
    15·1 answer
  • How is energy transformation related to molecular activity.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!