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
Monica [59]
3 years ago
12

A bulldozer does 45,000 joules of work to push a boulder a distance of 30 meters.

Physics
1 answer:
Andrew [12]3 years ago
7 0

Answer:

1500N

Explanation:

we have ,

w= f*d

45,000 =f * 30

f=45000/30

f=1500N..

You might be interested in
A concrete piling of 50 kg is suspended from a steel wire of diameter 1.0 mm and length 11.2 m. How much will the wire stretch?
pentagon [3]

Explanation:

It is given that,

Mass of concrete pilling, m = 50 kg

Diameter of wire, d = 1 mm

Radius of wire, r = 0.0005 m

Length of wire, L = 11.2

Young modulus of steel, Y=20\times 10^{10}\ N/m^2

The young modulus of a wire is given by :

Y=\dfrac{\dfrac{F}{A}}{\dfrac{\Delta L}{L}}

Y=\dfrac{F.L}{A\Delta L}

\Delta L=\dfrac{F.L}{A.Y}

\Delta L=\dfrac{50\ kg\times 9.8\ m/s^2\times 11.2\ m}{\pi (0.0005\ m)^2\times 20\times 10^{10}\ N/m^2}

\Delta L=0.034\ m

So, the wire will stretch 0.034 meters. Hence, this is the required solution.

8 0
4 years ago
Explain why a roller coaster’s second hill cannot be taller than the first hill.
max2010maxim [7]
There will not be enough momentum from the first hill to cross another hill if he same or larger size because of the way potential energy and kinetic energy works it will not be able go as high as it could go on he fist hill.
4 0
3 years ago
Read 2 more answers
Rogan claims that he can run 8 miles per hour. Use the speed formula to determine how many minutes it would take him to run one
MAXImum [283]

Answer:

he would have to run at a 7 and a half mile to get 8 miles in an hour

Explanation:

8 0
3 years ago
Read 2 more answers
Which of the following decreases with increasing atomic number in Group 2A?
Semenov [28]
"Ionization energy" is the one among the following choices given in the question that <span>decreases with increasing atomic number in Group 2A. The correct option among all the options that are given in the question is the third option or option "C". I hope that the answer has helped you.</span>
7 0
3 years ago
Read 2 more answers
If you help me with the correct answer I will give you the brainlist
gulaghasi [49]

Answer:

1. A force is a push or pull upon an object resulting from the object's interaction with another object.  

Explanation:

6 0
2 years ago
Other questions:
  • A child holds onto a string attached to a toy boat and exerts a force of 7.5 N to pull the boat a distance of 9.2 m a long a str
    9·1 answer
  • In one hour Earth receives enough solar energy to meet the energy needs of the world for
    12·1 answer
  • How many moles of N2O5 are needed to produce 7.90 g of NO2 <br><br> 2N2O5 = 4NO2 + O2
    8·2 answers
  • A young child cannot understand<br>another person's perspective because he is​
    5·1 answer
  • How are molecule shapes determined by electrons
    12·2 answers
  • When acceleration and velocity are the in the same direction, the speed will​
    13·1 answer
  • Samaira needs to rent some tents for an outdoor family reunion in July what is the best type of tent for Samaira to rent so that
    7·2 answers
  • The initial speed of a body is 4.24 m/s. What is its speed after 2.91 s if it accelerates uniformly at -1.76 m/s2
    15·1 answer
  • The freefall acceleration on the moon is 1/6 of its value on earth. suppose he hit the ball with a speed of 25m/s an angle of 30
    14·1 answer
  • Hey everyone! THIS IS VERY IMPORTANT!!!!!!!! im in 8th grade and my science DBA is tomorrow and i need dba notes. its lesson 4.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!