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
5

A sled is at rest at the top of a slope 2 m high. The sled has a mass of 45 kg. What is the sled's potential energy?

Physics
1 answer:
kap26 [50]3 years ago
8 0

Answer:

PE = 882 J

Explanation:

Through the International System we know that the gravity of the earth is 9.8 m/s², so...

Data:

  • m = 45 kg
  • g = 9.8 m/s²
  • h = 2 m
  • PE = ?

Formula:

  • \boxed{\bold{PE=m*g*h}}

Replace and solve:

  • \boxed{\bold{PE=45\ kg*\ 9.8\frac{m}{s^{2}}*2\ m}}
  • \boxed{\boxed{\bold{PE=882\ J}}}

The potential energy of the sled is <u>882 Joules</u>.

Greetings.

You might be interested in
Sugar crystals enter a dryer at the rate of 1000 kg h-1 and at 20% w.b. moisture content. They leave the dryer at 3% w.b. moistu
ArbitrLikvidat [17]

Answer:

The dryer evaporate 200 - 24.74 kg of water per hour

To remove 1kg of water it need 3000 K J

So to remove, 175.26 Kg

it need 5.257x 10^{5} KJ of heat per hour.

Explanation:

In one hour, the amount of sugar entering = 1000 kg

w.b moisture content is defined as,

weight of water / weight of water + weight of dry

W_{w}/W_{w} + W_{d} x 100

W_{w} + W_{d} = 1000 kg when entering

it has 20% moisture content when entering

W_{w} = 0.2 x 1000 = 200 kg

when leaving it has 3% moisture content then weight of dry material

W_{d} = 1000 - 200 = 800 Kg

\frac{W_{w}^{'} }{W_{w}^{'} + W_{d}^{'}    } = 0.03

\frac{W_{w}^{'} }{W_{w}^{'} + 800    } = 0.03

W_{w} ^{'} = 0.03 x W_{w} ^{'} + 0.03 x 800

W_{w} ^{'} = 24.74 kg

When leaving the dryer, the crystals has total weight of the water = 24.74 kg per hour.

The dryer evaporate 200 - 24.74 kg of water per hour

To remove 1kg of water it need 3000 K J

So to remove, 175.26 Kg

it need 5.257x 10^{5} KJ of heat per hour.

3 0
3 years ago
Match these terms with their definitions.
adoni [48]
The correct matches are as follows:

<span>1. measure of disorder 
</span>entropy<span>

2. the study of energy conversions 
</span>thermodynamics 
<span>
3. conservation of energy when heat is added 
</span>second law of thermodynamics 
<span>
4. disorder increasing 
</span>the kinetic and potential energy of the molecules of a substance 
<span>
5. reaching a state of total disorder 
</span>maximum entropy <span>
 
6. internal energy 
first law of thermodynamics</span>
7 0
3 years ago
Read 2 more answers
The potential energy of an object attached to a spring is 2.60 J at a location where the kinetic energy is 1.40 J. If the amplit
anyanavicka [17]

Answer:

This is the equation for elastic potential energy, where U is potential energy, x is the displacement of the end of the spring, and k is the spring constant. 

 U = (1/2)kx^2 

 U = (1/2)(5.3)(3.62-2.60)^2 

 U =  2.75706 J

Read more on Brainstorm - httpd://brainstorm/question/7981441#read more

Explanation:

6 0
3 years ago
When the volcano Krakatoa erupted in 1883, it was heard 5000 km away. Which statement about the sound from the volcano is not co
lina2011 [118]
Answer a) is incorrect as sound does not travel in a vacuum.
7 0
3 years ago
A 2N and 6N force pull on an object to the right and a 4N force pulls to the left a 0.5kg object. What is the net force on the o
Angelina_Jolie [31]

Explanation:

F net = 2+6-4 ( 2 and 6 N are in same direction so they get added, 4N in opposite direction so it will be subtracted)

F net=4 N

3 0
2 years ago
Other questions:
  • The force of gravity is responsible for continuously changing the ______ of a satellite.
    7·2 answers
  • A "homemade" capacitor can be built by placing a sheet of paper between two foil. Imagine that the sheet of paper is 21 cm x 30
    8·1 answer
  • Are you doing work holding a heavy piece of furniture in place
    13·1 answer
  • how much energy is stored in a 7.0 cm spring that has a spring constant of 500 N/m when it is stretched 3.0 cm​
    10·1 answer
  • An exploration submarine should be able to descend 1200 m down in the ocean. If the ocean density is 1020 kg/m3, what is the max
    8·1 answer
  • What causes the pressure that allows diamonds to form in the mantle?
    14·1 answer
  • The coefficients of friction between a race cars tyres and the track surface are
    8·1 answer
  • Please round to three sig fig
    8·1 answer
  • State the relationship between the mass of trolley and acceleration of the trolley?
    12·1 answer
  • Describe nucleus (animal) in your own words(20 points)​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!