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
navik [9.2K]
3 years ago
8

The 8 kg block is then released and accelerates to the right, toward the 2 kg block. The surface is rough and the coefficient of

friction between each block and the surface is 0.4 . The two blocks collide, stick together, and move to the right. Remember that the spring is not attached to the 8 kg block. Find the speed of the 8 kg block just before it collides with the 2 kg block. Answer in units of m/s.
Physics
1 answer:
natita [175]3 years ago
7 0

Answer:

3.258 m/s

Explanation:

k = Spring constant = 263 N/m (Assumed, as it is not given)

x = Displacement of spring = 0.7 m (Assumed, as it is not given)

\mu = Coefficient of friction = 0.4

Energy stored in spring is given by

U=\dfrac{1}{2}kx^2\\\Rightarrow U=\dfrac{1}{2}\times 263\times 0.7^2\\\Rightarrow U=64.435\ J

As the energy in the system is conserved we have

\dfrac{1}{2}mv^2=U-\mu mgx\\\Rightarrow v=\sqrt{2\dfrac{U-\mu mgx}{m}}\\\Rightarrow v=\sqrt{2\dfrac{64.435-0.4\times 8\times 9.81\times 0.7}{8}}\\\Rightarrow v=3.258\ m/s

The speed of the 8 kg block just before collision is 3.258 m/s

You might be interested in
Which excited electron has the lowest energy?
bearhunter [10]

Answer:

The lowest energy of electron is the ground state.

Explanation:

4 0
2 years ago
Read 2 more answers
Is telekinesis real??? I really wanna start learning it!
Law Incorporation [45]

Answer:

Highly doubt something that requires great focus and mental strength exists

3 0
3 years ago
A copper atom has an atomic number of 29 and an atomic mass of 64. What
Elina [12.6K]

Explanation:

Answer is B.

B. It has a central nucleus composed of 29 protons and 35 neutrons,surrounded by an electron cloud containing 29 electrons.

I hope it's helpful!

3 0
2 years ago
A skater makes one revolution per second, f = w/(2p) = 1, with her arms and leg stretched (left). By lowering her leg and bringi
Firlakuza [10]

Answer:

Answer is given in the attachment.

Explanation:

Download pdf
4 0
3 years ago
Read 2 more answers
What layer of the atmosphere is hot but does not have enough gas molecules to transfer heat to you (i.e., you would not feel the
fenix001 [56]

Answer:

thermosphere...........

7 0
2 years ago
Other questions:
  • A pile driver lifts a 450 kg weight and then lets it fall onto the end of a steel pipe that needs to be driven into the ground.
    12·2 answers
  • How many protons and neutrons are present in an atom of 3919k? express your answer as integers separated by a comma?
    7·1 answer
  • A paper weight is dropped from the roof of a block of multi story flats. Each storey being 3 metre high. It passes the ceiling o
    9·1 answer
  • What electric field strength would store 12.5 JJ of energy in every 6.00 mm3mm3 of space?
    13·1 answer
  • Explain Kepler's second law in detail with figures.
    5·1 answer
  • An exothermic reaction is taking place in a test tube what would you expect to feel when you touch the outside of the test tube
    12·1 answer
  • In a particular lab, a cube of ice (Tice = -5.5˚C) is taken and dropped into a calorimeter cup (98g) partially filled with 326 g
    7·1 answer
  • What is the displacement (in miles, with direction) from the<br> Aquarium to the Cemetery?
    10·1 answer
  • Give at least 4 human activities which demonstrate the involvement of inertial frame of reference​
    8·1 answer
  • Molten iron has a density of 7.0 g/cm. In its solid state, iron has a density of
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!