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
NikAS [45]
3 years ago
6

A rope is tied to a box and used to pull the box 2.3 m along a horizontal floor. The rope makes an angle of 30∘ with the horizon

tal and has a tension of 5 N. The opposing friction force between the box and the floor is 1 N
Part A

How much work does gravity do on the box?

Part B

How much work does the tension in the rope do on the box?

Part C

How much work does the friction do on the box?

Part D

How much work does the normal force do on the box?

Part E

What is the total work done on the box?
Physics
1 answer:
Savatey [412]3 years ago
6 0

Answer:

Answered

Explanation:

A) The work done by gravity is zero because displacement and the gravitational force are perpendicular to each other.

W= FS cosθ

θ= 90 ⇒cos90 = 0 ⇒W= 0

B) work done by tension

W= Tcosθ×S= 5cos30×2.30= 10J

C) Work done by friction force

W= f×s=1×2.30= 2.30 J

D) Work done by normal force is Zero because the displacement and the normal force are perpendicular to each other.

E) The net work done= Work done by tension in the rope - frictional work

=10-2.30= 7.7 J

You might be interested in
8.
eimsori [14]
B. Unbalanced force
3 0
3 years ago
A 10.0g piece of copper wire, sitting in the sun reaches a temperature of 80.0 C. how many Joules are released when the copper c
Zolol [24]

Answer:

150.8 J

Explanation:

The heat released by the copper wire is given by:

Q=mC_s \Delta T

where:

m = 10.0 g is the mass of the wire

Cs = 0.377 j/(g.C) is the specific heat capacity of copper

\Delta T=40.0 C - 80.0 C=-40.0 C is the change in temperature of the wire

Substituting into the equation, we find

Q=(10.0 g)(0.377 J/gC)(-40.0^{\circ})=-150.8 J

And the sign is negative because the heat is released by the wire.

6 0
3 years ago
A charge +1.9 μC is placed at the center of the hollow spherical conductor with the inner radius 3.8 cm and outer radius 5.6 cm.
Archy [21]

To solve this problem we will apply the concepts related to load balancing. We will begin by defining what charges are acting inside and which charges are placed outside.

PART A)

The charge of the conducting shell is distributed only on its external surface. The point charge induces a negative charge on the inner surface of the conducting shell:

Q_{int}=-Q1=-1.9*10^{-6} C. This is the total charge on the inner surface of the conducting shell.

PART B)

The positive charge (of the same value) on the external surface of the conducting shell is:

Q_{ext}=+Q_1=1.9*10^{-6} C

The driver's net load is distributed through its outer surface. When inducing the new load, the total external load will be given by,

Q_{ext, Total}=Q_2+Q_{ext}

Q_{ext, Total}=1.9+3.8

Q_{ext, Total}=5.7 \mu C

5 0
4 years ago
A lens of focal length 10.0 cm
fgiga [73]

Answer:

30cm

Explanation:

7 0
2 years ago
Eva's boyfriend says he loves her, but she wants proof. In order to obtain the most trustworthy nonverbal signals of how he real
BaLLatris [955]

Answer:D) His Facial expressions when they spend time together

 

Explanation:

Eva's should carefully observe the normal verbal signs by her lover because facial expression gives the hint to listener or viewer that one is interested towards other.

Some common facial Expression are

  • Smiling Eyes:While smiling is, of course, an important expression when we speak, attempting to keep a constant  smile could make you look more like a trained sociopath than a happy, enthusiastic presenter. These enables other person to feel the good vibes out of you and left a positive impact of your presence.
  • Nod on: It is important to express interest in the feedback of your audience. No one likes an identity-centered snob. One way to show that you're actually engaged in the comments and questions they pose is by nodding while you're listening. Moving your head a little wider will help to express your attention as well.

                       

6 0
3 years ago
Other questions:
  • Boss tweed encourages his associates to work "like a well-oiled machine", thus providing his workers with
    10·2 answers
  • Muscles convert chemical energy into A) light energy. B) nuclear energy. C) mechanical energy. D) electromagnetic energy.
    15·2 answers
  • The resolution of a microscope describes the scale of the smallest detail that is clearly observable through the microscope. For
    10·1 answer
  • Answer the following questions:
    14·2 answers
  • How many regions does the deltoid muscle have
    5·2 answers
  • What does the law of conservation of mass state?
    8·2 answers
  • How does wave energy impact the erosion of a rock?
    14·1 answer
  • A material that breaks down quickly in the environment is called??
    6·2 answers
  • Abby is writing a biography of Isaac Newton. He was a brilliant English scientist who developed the law of universal gravitation
    5·1 answer
  • What do simple machines increase?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!