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
-Dominant- [34]
3 years ago
12

A man lifts a 25.9 kg bucket from a well and does 5.92 kJ of work.The acceleration of gravity is 9.8 m/s^2 . How deep is the wel

l? Assume that the speed of the bucket remains constant as it is lifted. Answer in units of m.
Physics
1 answer:
Jet001 [13]3 years ago
4 0

Answer:

The well is 23.3 m

Explanation:

As the bucket is lifted out of the well, energy in the man is being transferred to the bucket as gravitational potential energy.

Work done against gravity =  mass * height * acceleration due to to gravity

W  =  mgh

5 920 J = 25.9 kg * h * 9.8 m/s²

h = 23.3 m

You might be interested in
Reason why ink is most likely to ooze out of a pen when one is up in an airplane​
Illusion [34]

Answer:

Because in higher altitudes atmospheric pressure is low

8 0
2 years ago
Identify the type of chemical reaction:<br><br> CaCO3 --&gt;CaO + CO2
Blababa [14]

Explanation:

<em>decomposition </em><em>reaction.</em><em>.</em><em>.</em><em>.</em><em>.</em>

3 0
2 years ago
Read 2 more answers
baseball is hit into the air at an initial speed of 37.2 m/s and an angle of 49.3 ° above the horizontal. At the same time, the
Agata [3.3K]

Answer:

The average speed of the fielder is 5.24 m/s

Explanation:

The position vector of the ball after it was hit can be calculated using the following equation:

r = (x0 + v0 · t · cos α, y0 + v0 · t · sin α + 1/2 · g · t²)

Where:

r = position vector at time t.

x0 = initial horizontal position.

v0 = initial velocity.

t = time.

α = launching angle.

y0 = initial vertical position

g = acceleration due to gravity (-9.8 m/s² considering the upward direction as positive).

Please, see the attached figure for a graphical description of the problem.

When the ball is caught, its position vector will be (see r1 in the figure):

r1 = (r1x, 0.873 m)

Then, using the equation of the position vector written above:

r1x = x0 + v0 · t · cos α

0.873 m = y0 + v0 · t · sin α + 1/2 · g · t²

Since the frame of reference is located at the point where the ball was hit, x0 and y0 = 0. Then:

r1x = v0 · t · cos α

0.873 m = v0 · t · sin α + 1/2 · g · t²

Let´s use the equation of the y-component of r1 to obtain the time of flight of the ball:

0.873 m = 37.2 m/s · t · sin 49.3° - 1/2 · 9.8 m/s² · t²

0 = -0.873 m + 37.2 m/s · t · sin 49.3° - 4.9 m/s² · t²

Solving the quadratic equation:

t = 0.03 s and t = 5.72 s.

It would be impossible to catch the ball immediately after it is hit at t = 0.03 s. Besides, the problem says that the ball was caught on its way down. Then, the time of flight of the ball is 5.72 s.

With this time, we can calculate r1x which is the horizontal distance traveled by the ball from home:

r1x = v0 · t · cos α

r1x = 37.2 m/s · 5.72 s · cos 49.3°

r1x = 1.39 × 10² m

The distance traveled by the fielder is (1.39 × 10² m - 1.09 × 10² m) 30.0 m.

The average velocity is calculated as the traveled distance over time, then:

average velocity = treveled distance / elapsed time

average velocity = 30.0 m / 5.72 s = 5.24 m/s

8 0
3 years ago
Technician A says that the starter motor used to crank diesel engines can draw up to 400 amps of current. Technician B says that
Aleks04 [339]

Answer: Option A : Technician A

Explanation:

The statement/observation, "that the starter motor used to crank diesel engines can draw up to 400 amps of current" made by Technician A is correct.

A diesel engine uses up to 400+ Amperes of electricity to start up a diesel engine in the ignition chamber of motor engine.

8 0
3 years ago
Which statement is true about acceleration?<br> who is an underated physicist?
wlad13 [49]
Answer: A vehicle's capacity to gain speed within a short time...
4 0
3 years ago
Other questions:
  • A goldfish is swimming at 3.20 cm/stoward the front wall of a rectangular aquarium. What is theapparent speed of the fish as mea
    14·1 answer
  • In a fusion reaction, the nuclei of two atoms join to form a single atom of a different element. In such a reaction, a fraction
    5·1 answer
  • Which example is NOT the proper use of a casting of a toolmark?
    9·1 answer
  • What is the speed of a car that traveled 300 miles in 6 hours?
    12·1 answer
  • COMPA<br>WE APPLIANCE<br>NO STABILIZER<br>REQUIRED<br>* For 160V-260V power supply​
    12·1 answer
  • What is a sentence for crater
    11·2 answers
  • What is a string theory ?
    8·2 answers
  • A sailboat took 25 hours to cover 1/4 of a journey. Then, it
    11·1 answer
  • An object has k.e. of 10J at a certain instant. If it is acted on by an opposing force of 5N, which of the number A to E below i
    5·1 answer
  • FIRST TO ANSWER CORRECTLY GETS BRAIBLIEST!!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!