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
Maru [420]
3 years ago
8

Using a rope that will snap if the tension in it exceeds 379 N, you need to lower a bundle of old roofing material weighing 473

N from a point 6.50 m above the ground. (a) What magnitude of the bundle's acceleration will put the rope on the verge of snapping
Physics
1 answer:
Tema [17]3 years ago
8 0

Answer:

Acceleration = a = -1.94 m/s^2

Explanation:

Weight of the bundle = W = mg  

                      m = W/g = 473/9.8  

                      m = 48.26 kg

There are two forces acting on the bundle such as tension in the upward direction and weight in the downward direction. So, according to newton’s second law of motion:  

Sum of forces = ma  

                           T - W = ma  

                           a = (T – W)/m

                           a = (379 - 473)/48.26

                           a = -1.94 m/s^2

Negative sign shows that the acceleration is in the downward direction.

You might be interested in
If a car travels 30 mi. north for 30 min., 60 mi. east for 1.0 hour, and 30 mi. south for 30 min., what is the average speed
Ainat [17]

Answer: 60mph

Explanation:

Given the following :

First leg travel:

Distance = 30 miles

Time of travel= 30 minutes = 0.5 hour

Second leg travel:

Distance = 60 miles

Time of travel = one hour

Average speed :

Speed = total Distance / time of travel

Total distance in miles = (30 + 60) miles = 90 miles

Total time of travel = 1 hour + 0.5 hour = 1.5 hours

Average speed = total distance traveled / total travel time

Average speed = 90 miles / 1.5 hours

Average speed = 60 miles / hour

= 60mph

3 0
3 years ago
A hot-water stream at 80 ℃ enters a mixing chamber with a mass flow rate of 0.5 kg/s where it is mixed with a stream of cold wat
rewona [7]

Answer:

\dot{m_{2}}=0.865 kg/s

Explanation:

\dot{m_1}= 0.5kg/s

from steam tables , at 250 kPa, and at

T₁ = 80⁰C ⇒ h₁ = 335.02 kJ/kg

T₂ = 20⁰C⇒ h₂ = 83.915 kJ/kg

T₃ = 42⁰C ⇒ h₃ = 175.90 kJ/kg

we know

\dot{m_{in}}=\dot{m_{out}}

\dot{m_{1}}+\dot{m_{2}}=\dot{m_{3}}

according to energy balance equation

\dot{m_{in}}h_{in}=\dot{m_{out}}h_{out}

\dot{m_{1}}h_{1}+\dot{m_{2}}h_{2}=\dot{m_{3}}h_{3}

\dot{m_{1}}h_{1}+\dot{m_{2}}h_{2}=(\dot{m_{1}}+\dot{m_{2}})h_{3}\\(0.5\times 335.02)+(\dot{m_{2}}\times 83.915)=(0.5+\dot{m_{2}})175.90\\\dot{m_{2}}=0.865 kg/s

4 0
3 years ago
The graph shows the motion of a car. Which segment shows that the car is slowing down? A, B, C, or D Graph:
shutvik [7]

Answer:

Segment c

Explanation:

5 0
3 years ago
Read 2 more answers
When the force at the ends of a bar pushes rather than pulls, the bar experiences?
Mariulka [41]

Answer:

I don't know sorry hopefully I can help with something else tho

4 0
2 years ago
Fiona claims that the diagram below shows simple machines, but Chad claims that it shows a compound machine.
Elza [17]

Answer:

Simple machine

Explanation:

It is a simple machine because the person wants to raise the load by an inclined plane. Simple machines perform work with the mechanical advantage offered by the machine itself, such as using a bar as Lever, lifting a load by means of a pulley. simple machines multiply or change direction a force. While Composite machines are the Union of several simple machines that perform a given job, examples of combined machines are found on bicycles, a washing machine, a car, and others.

5 0
3 years ago
Read 2 more answers
Other questions:
  • What best describes a possible transfer of energy? A mechanical wave transfers energy through matter. A longitudinal wave transf
    14·2 answers
  • an object which has a mass of 70 kg is sitting on a cliff 10 m high calculate the objects gravitational potential energy given g
    7·1 answer
  • Can I have help? please please please!
    8·2 answers
  • A bullet of mass 0.017 kg traveling horizontally at a high speed of 290 m/s embeds itself in a block of mass 5 kg that is sittin
    6·1 answer
  • What is the name of family or group two
    9·1 answer
  • Mendeleev noticed that if he organized the elements by atomic weight certain patterns emerged. for instance, elements in the sam
    15·2 answers
  • A balloon contains helium gas. Which applies to the volume of the gas in the balloon when pressure is increased at constant temp
    12·1 answer
  • One of the characteristic of sound enogy Similar<br>to light energy is?​
    12·1 answer
  • 2. Fill in the blanks
    9·1 answer
  • What is the acceleration at 3 seconds?<br><br> Please explain your answer. Thank you :]
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!