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
satela [25.4K]
3 years ago
11

Alex is asked to move two boxes of books in contact with each other and resting on a rough floor. He decides to move them at the

same time by pushing on box A with a horizontal pushing force Fp = 9.1 N. Here A has a mass mA = 10.6 kg and B has a mass mB = 7.0 kg. The contact force between the two boxes is →FC. The coefficient of kinetic friction between the boxes and the floor is 0.02. Assume →Fp
acts in the +x direction.
a. What is the magnitude of the acceleration of the two boxes?
b. What is the force exerted on mB
by mA? In other words what is the magnitude of the contact force →FC?
c. If Alex were to push from the other side on the 7.0 kg box, what would the new magnitude of →FC be?
Physics
1 answer:
Over [174]3 years ago
3 0

Answer:

Part a)

a= 0.32 m/s^2

Part b)

F_c = 3.6 N

Part c)

F_c = 5.5 N

Explanation:

Part a)

As we know that the friction force on two boxes is given as

F_f = \mu m_a g + \mu m_b g

F_f = 0.02(10.6 + 7)9.81

F_f = 3.45 N

Now we know by Newton's II law

F_{net} = ma

so we have

F_p - F_f = (m_a + m_b) a

9.1 - 3.45 = (10.6 + 7) a

a = \frac{5.65}{17.6}

a= 0.32 m/s^2

Part b)

For block B we know that net force on it will push it forward with same acceleration so we have

F_c - F_f = m_b a

F_c = \mu m_b g + m_b a

F_c = 0.02(7)(9.8) + 7(0.32)

F_c = 3.6 N

Part c)

If Alex push from other side then also the acceleration will be same

So for box B we can say that Net force is given as

F_p - F_f - F_c = m_b a

9.1 - 0.02(7)(9.8) - F_c = 7(0.32)

F_c = 9.1 - 0.02 (7)(9.8) - 7(0.32)

F_c = 5.5 N

You might be interested in
The velocity of a mass moving in a circular path is..
Alenkasestr [34]
Constantly changing.
5 0
3 years ago
The table shows the diameters of the planets in our solar system. Assume that a basketball whose diameter is 25
tino4ka555 [31]

Answer:

Mercury:

.85

pea

Venus:

2.1

gumball

Earth:

2.2

gumball

Mars:

1.2

marble

Uranus:

9

grapefruit

Neptune:

8.6

softball

Explanation:

I have no clue if I'm right but hopefully, I am

3 0
2 years ago
HELP PLS 100 POINTS TAKING TEST RN
s2008m [1.1K]

Answer:

I think he answer is C but I could be wrong

Explanation:

brainliest plz

8 0
3 years ago
Read 2 more answers
1.10) For a fixed mass of gas at constant temperature, if the volume of the gas (V) increases to twice its original amount, the
Aliun [14]
B. 1/2p
From the relation
P1V1=P2V2
P2=P1V1/V2
If everything equals one
P2=1*1/2(1)
That would equal 1/2
I hope this helps
Please mark as brainliest
7 0
3 years ago
Read 2 more answers
If a golf ball and a ping-pong ball both move with the same kinetic energy, which has the greater speed? 1. the golf ball 2. can
schepotkina [342]
Think about it like this, the more mass there is, the faster its going to go. If you took a golf ball and a ping pong ball and you held them each separately, you would notice that the golf ball is heavier. If they move with the same kinetic energy, but the golf ball WEIGHS more, then the golf ball will have the greater speed. If you think about it, the ping pong ball may be taking its time to get to wherever its going. 
4 0
3 years ago
Other questions:
  • Why was the idea of continental drift not initially accepted by many other scientists and the general public at the time?
    5·1 answer
  • Help!! I’ll give brainliest! Match the changes in sound wave properties with their effects on an observer.
    6·1 answer
  • A skater glides along a circular path of radius 3.00 m. If he coasts around one half of the circle, find the magnitude of the di
    14·1 answer
  • The closeness of measured values to an accepted value is the BLANK of the data ?
    14·1 answer
  • A total charge Q is distributed uniformly over a large flat insulating surface of area A . If the electric field magnitude is eq
    5·1 answer
  • i like honey but when u put it on your feet it sticks to the ground. how do i avoid the stickyness of honey when i want to clean
    9·2 answers
  • The term fetus completes which of the following lists to show the correct order of development?
    12·1 answer
  • A group of big city tenants were upset about rising rent for their apartments, and decided to play a prank on the Building Manag
    11·1 answer
  • You throw a baseball a distance of 20 meters. Is it work or not work?
    6·1 answer
  •  what is the difference between repelling and attracting
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!