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
Vladimir79 [104]
3 years ago
10

So we were working on some pulley problems but this one has kinda left me scratching my head, please help! My question is for pa

rt C :' )

Physics
1 answer:
USPshnik [31]3 years ago
8 0

Explanation:

(c) I assume we're looking for mA.

Sum of forces on B in the -y direction:

∑F = ma

mBg − T = mBa

Sum of forces on A in the +x direction:

∑F = ma

T = mAa

Substitute:

mBg − mAa = mBa

mBg − mBa = mAa

mA = mB (g − a) / a

Plug in values:

mA = (5 kg) (10 m/s² − 0.01 (10 m/s²)) / (0.01 (10 m/s²))

mA = 495 kg

The answer key seems to have a mistake.  It's possible they meant mB = 1 kg, or they changed mB to 5 kg but forgot to change the answer.

You might be interested in
A certain 100W light bulb has an efficiency of 95%. How much thermal energy will this light bulb add to the inside of a room in
Usimov [2.4K]
Since the bulb consumes 100 watts of power and its efficiency is 95%,
it generates 95 watts of light energy and 5 watts of heat energy whenever
it's turned on.

5 watts means  5 joules of energy per second.

(2.5 hours) x (3,600 seconds/hour) =  9,000 seconds

(9,000 seconds) x (5 joules/second)  =  45,000 joules of heat in 2.5 hours

7 0
3 years ago
(Mass vs. Weight) HELP PLZ!!
Lina20 [59]

\huge \boxed { \sf{Answers}}

  • c. The weight of an object on the moon will be the same as its weight on Earth. It is false because the weight of an on the moon will be 1/6 th times its weight on Earth.
  • d. The weight of an object is its mass multiplied by the force of gravity. The statement is false because the formula of weight is mass × acceleration due to gravity, not force of gravity.
  • e. The mass and weight of an object are the same thing. The statement is false because mass means a body of matter. While weight of an object is its mass multiplied by the force of gravity.
  • f. The mass of an object is the force of gravity acting upon an object. It is false because it will be the weight of the object not mass.
  • So, the answers are c, d, e and f.

Hope you could understand.

If you have any query, feel free to ask.

7 0
2 years ago
Heat and/or energy are transferred from one object to another if the objects have _________ temperature(s).
NISA [10]

Answer:

.....different temperatures

Explanation:

heat is a form of energy that is transfered from a body of high temperature to a body of low temperature....Cannot happen if the two bodies have the same temperature(thermal equilibrium)

7 0
3 years ago
Light is shown through air on a diamond (n=2.42) and it partially reflects and refracts.
NikAS [45]

Answer:

Light is shown through air on a diamond n=2.42) and it partially reflects and reflects.

Based on the incident angle of 62.5 shown what is the angle of reflection of the light

question of options

21.5

6 0
3 years ago
When does the potential energy of a swinging pendulum increase the most?
xxTIMURxx [149]
Maybe this can help:

https://blogs.bu.edu/ggarber/interlace/pendulum/energy-in-a-pendulum/
3 0
3 years ago
Other questions:
  • How strongly the planet you're on Pulls on you
    6·2 answers
  • A proton (charge +e, mass mp), a deuteron (charge +e, mass 2mp), and an alpha particle (charge +2e, mass 4mp) are accelerated fr
    14·1 answer
  • Pressure and temperature ______ with depth below Earth’s surface.
    12·1 answer
  • Laissez-faire situations are characterized by a high degree of government involvement (t or <br> f.
    7·2 answers
  • Her wolle<br>molecules are called<br>e Blood cells, Proteins<br>membrance remain in the blood​
    10·1 answer
  • Which will reduce the possible environmental damage associated with mining uranium?
    13·1 answer
  • A 1400 kg car is moving at 33.8 m/s when a force is applied the opposite direction of the car's motion. The car slows down to 21
    12·1 answer
  • Please help with an explanation for 30 points even if u only do one (but with good explanation)
    14·1 answer
  • Can someone help me with this ?<br><br>I need proper explanation ~ ​
    10·1 answer
  • 032. A 25.0 kg bicycle is traveling at a speed of 10.0 m/s.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!