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
Paladinen [302]
2 years ago
10

An unknown force is applied to a 12 kg mass. The force acts at an angle of 30.0 degrees above the horizontal. Determine the forc

e acting if the force acts for a horizontal displacement of 22 meters and increases the 12 kg mass's speed from 11 m/s to 26 m/s.
Physics
1 answer:
larisa86 [58]2 years ago
3 0

The mass undergoes a change in kinetic energy of

∆K = 1/2 (12 kg) [(26 m/s)² - (11 m/s)²] = 3330 J

By the work-energy theorem, the total work W performed on the mass is equal to ∆K. Assuming no friction, only the horizontal component of the applied force performs work on the mass.

Let F be the magnitude of this force, so that its horizontal component has mag. F cos(30.0°) = √3/2 F. It acts over a displacement of 22 m and performs 3330 J of work in the process, so that

3330 J = (√3/2 F) (22 m)   ⇒   F = 1110√3/11 N ≈ 175 N

You might be interested in
A given wave has a wavelength of 5.0 m and a frequency of 2.0 Hz. How fast
Jet001 [13]
B is the answer 3.0 m/a
6 0
3 years ago
If an all electric house uses 2400 kWh in a month, what will the amount of the bill for electricity be at a rate of 9.5 cents pe
alexira [117]

Answer:

<h2>$228</h2>

Explanation:

Given data

Total electricity consumption = 2400 kWh

Rate of consumption = 9.5 cent per kWh

converting cent to dollar we have. 9.5/100= $0.095

hence the bill is 2400*0.095= $228

6 0
3 years ago
Which statement describes the magnetic field inside a bar magnet? It points from north to south. It points from south to north.
Levart [38]

Inside the bar magnet, the magnetic field points from north to south. Statement A is correct.

Magnetic Field:

It is defined as a vector field or the influence of the magnet on the electric current, charges and ferromagnetic substance.

The strength of magnetic field is depends up on the numbers of magnetic field lines per unit area.

  • Magnetic field lines emerge from the North pole and end in the South pole of a bar magnet.
  • Inside the magnet are also present inside the bar magnet and never intersect at any point.

Therefore, inside the bar magnet, the magnetic field points from north to south.

To know more about Magnetic Field:

brainly.com/question/19542022

4 0
3 years ago
Read 2 more answers
What happens to the atomic number of an atom when the number of neutrons in the nucleus of that atom increases? a It decreases b
kupik [55]

Answer:

It remains the same

Explanation:

It remains the same. This is because the number of protons doesn't change and the number of protons determines the atomic number.

8 0
2 years ago
A car enters a level, unbanked semi-circular hairpin turn of 100 m radius at a speed of 28 m/s. The coefficient of friction betw
meriva

Answer:

As  28m/s = 28m/s

Explanation:

r = the radius of the curve

m =  the mass of the car

μ = the coefficient of kinetic friction

N = normal reaction

When rounding the curve, the centripetal acceleration is

a = \frac{v^{2}}{r}

therefore

\mu mg = m \frac{v^{2}}{r} \\\\ \mu =  \frac{v^{2}}{rg}

v = \sqrt{\mu rg}

\mu = \sqrt{0.8 \times 100\times9.8} \\\\= 28m/s

As  28m/s = 28m/s

8 0
3 years ago
Other questions:
  • How many types of quarks are there and what is the name of one of them
    10·1 answer
  • Your 64-cm-diameter car tire is rotating at 3.5 rev/s when suddenly you press down hard on the accelerator. After traveling 200
    6·1 answer
  • A 625 kg sailboat moves with a momentum of 13,200 kg•m/s what is the velocity of the sailboat
    9·1 answer
  • Which of the following are not likely to form bonds?
    8·2 answers
  • Studies show that the amount of heat stored in the ocean is increasing. What effect might this have?
    12·2 answers
  • Design a safety restraint or device for a motorcycle,
    6·1 answer
  • The Sankey diagram shows the energy transfers in an LED light bulb.
    11·1 answer
  • if you have a stick magnet and a u magnet plus a frigde magnet what way will it pull and which one is the strongest if it does n
    7·1 answer
  • Which element has an isotope with 43 neutrons and a mass number of 76?
    14·1 answer
  • Choose one inner planet and one outer planet and compare their similarities and differences.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!