PHYSICS MIDDLE SCHOOL

I don't understand these following questions, can someone please help me?1) find the work done by a 25 N force applied for 6 meters
2) calculate the potential energy of a 5 kg object sitting on a 3 m ledge
3) a rock is at the top of a 20 meter tall hill, the rock has a mass of 10 kg. how much potential energy does it have?

Answers

Answer 1
Answer:
These questions are testing to see if you know
the formulas for work and potential energy ... or
if you know where to find them when you need them.

1).  The formula for work is:

                       Work = (force) x (distance) .

In this question:  Work = (25 N) x (6 m) = 160 joules .
_____________________________

The formula for potential energy is

                   PE  = (mass) x (gravity) x (height) .

On Earth, gravity = 9.8 m/s² 

This information gives you both of the other questions.

#2).  PE  = (mass) x (gravity) x (height)

               = (5 kg) x (9.8 m/s²) x (3m) =  147 joules

#3).  PE  = (mass) x (gravity) x (height)

               = (10 kg) x (9.8 m/s²) x (20 m) =  1,960 joules

Related Questions

Which example best demonstrates the relationship between temperature and pressure?Question 19 options: melting ice, bubbles on a pizza popping when they are cut,   bubbles forming in dough when it is heated, or evaporating water
How do you know when the transfer of heat (thermal energy) has ended?
The wavelength of the light is 0.63 micrometers. How much of this length stays in 1 centimeterHELP PLEASE
What function do capillaries serve in the cardiovascular system?A.carry blood to the brainB.return blood to the lungsC.help control body temperatureD.replace old blood cells
A kitten pushes a ball of yarn rolling toward it at 1.00 cm/s with its nose, displacing the ball of yarn 17.5 cm in the opposite direction in 2.00 s. What is the acceleration of the ball of yarn?

How do liquid water, ice, and water vapor differ from each other?

Answers

They are made of different states of matter.
Liquid water is a liquidIce is a solidWater vapour is a gas

When planning an oral presentation, you want to make sure to do all of the following except _____.1. Type up a paper to read to your audience
2. Practice presenting in front of friend or family
3. Practice presenting in front of a mirror
4. time the length of your presentation

Answers

Answer;

3. Practice presenting in front of a mirror

Explanation;

Like scientific papers, oral presentations at a conference or internal seminar are for sharing your research work with other scientists. They, too, must convince the audience that the research presented is important, valid, and relevant to them.

Planning a presentation involves a comprehensive assessment of the speaking situation. It is important to know the purpose of the presentation, know the audience and also where the presentation will take place, among other important aspects.

Answer:

The correct answer is option 2. Practice presenting in front of friend or family

Explanation:

Generally while making an oral presentation three things are very vital-  

a) Cover all the vital points of the research work presented through oral presentation thus writing all the points on a piece of paper is must.  

b) One must use appropriate body gesture while giving the  presentation , thus practicing in front of mirror is also a required exercise  

c) The presenter must be able to deliver his/her presentation in the stipulated time period thus timing the presentation is also important.  

Since mirror practice is sufficient to work on body language, eye contact with the audience and gesture, thus there is no need to practice in-front of friend or family.  

How can i make an egg survive an egg drop

Answers

You could cook it and then drop it or you can always wrap it in bubble wrap. 
you can boil the egg and wrap it in bubble wrap

During the summer months, why is the average temperature much higher in many regions of the globe?A. There is no snow.

B. The amount of sunlight reaching the environment stays constant.

C. More sunlight reaches the environment.

D. Less sunlight reaches the environment.

Answers

C. More sunlight reaches the environment.
C. More Sunlight reaches the enviroment

What is the formula for volume using density and mass

Answers


The definition of density is

                                                       Density                  = (mass) / (volume)

Multiply each side by 'volume' :    (density) x (volume) = (mass)

Divide each side by 'density' :                         Volume = (mass) / (density)
 
V=M/D
volume=mass/density

Select the best terms from the drop-down menus that fit the nuclear medicine descriptions.gamma-ray detection from tracers
assess disease progression, tissue function
a hybrid scan that involves nuclear medicine and X-ray imaging
radiation treatment near or within the tumor from implanted "seeds"

Answers

Answer:

Hi there, so gamma-ray detection from tracers: Pet Scan, assess disease progression, tissue function: Nuclear Medicine Scan, a hybrid scan that involves nuclear medicine and x-ray imaging: PET/CT, and lastly radiation treatment near or within the tumor from implanted "seeds": Brachytherapy. Hope this helps <3.

Explanation:

btw you cute <3.

Answer:

Pet Scan

Nuclear Medicine

PET/CT

Brachytherapy
Other Questions
In which direction does a bag at rest move when a force of 20 newtons is applied from the right? A. in the direction of the applied force B. in the direction opposite of the direction of the applied force C. perpendicular to the direction of the applied force D. in a circular motion
What did Mendel discover about genetic factors in pea plants
The ___________ energy in a mechanical system is determined by adding the potential and kinetic energy together.
Please explain as if I am a 6 year old; why is time travel theoretically impossible?