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
dezoksy [38]
2 years ago
6

A 15 kg object and a 18 kg object are connected by a massless compressed spring and

Physics
1 answer:
MatroZZZ [7]2 years ago
5 0

Hi there!

This is an example of a recoil collision.

Using the conservation of momentum:

p_i = p_f

The initial momentum is 0 kgm/s (objects start from rest), so:

p_f = 0

We are given that the 15 kg block has a velocity of 12 m/s to the left, so:

m_1v_1' + m_2v_2' = 0 \\\\15(-12) + 18v_2' = 0 \\\\

Solve for v2':

18v_2' = 180 \\\\v_2' = \boxed{10 m/s}

You might be interested in
Runaway truck ramps are common on mountainous highways in case the brakes fail on large trucks. If a
dusya [7]

Answer:

W=-21,870,000\ J

Explanation:

<u>Work and Kinetic Energy </u>

The work an object does due to its motion is equal to the change of its kinetic energy. Being ko and k1 the initial and final kinetic energy respectively and m the mass of the object, then

W=\Delta k=k_1-k_0

Since

\displaystyle k=\frac{mv^2}{2}

We have

\displaystyle W=\frac{mv_1^2}{2}-\frac{mv_0^2}{2}

The truck has a mass of 60,000 kg and is moving at 27 m/s. The runaway truck ramp must stop the truck, so the final speed is 0. Thus

\displaystyle W=\frac{(60,000)0^2}{2}-\frac{(60,000)(27)^2}{2}

W=0-21870000\ J

\boxed{W=-21,870,000\ J}

3 0
3 years ago
An accessory such as a coupling that performs a mechanical rather than an electrical function is called?
Assoli18 [71]
Fitting is the answer
5 0
2 years ago
Which of these best describes the difference between energy and power? A) Power and energy have nothing in common B) Energy and
Sphinxa [80]

D.Power has a time component while energy does not. This is because power is the RATE at which work is performed.

8 0
3 years ago
In a fission experiment observed by Hahn and Strassman, uranium-235 was bombarded by neutrons. The products of this ission react
wlad13 [49]

Answer:

helium-4 (90%) or tritium (7%).

Explanation:

hope it helped u buddy

7 0
3 years ago
The angular momentum of a flywheel having a rotational inertia of 0.140 kg ·m2 about its central axis decreases from 3.00 to 0.8
Rasek [7]

Answer

given,

I = 0.140 kg ·m²

decrease from 3.00 to 0.800 kg ·m²/s in 1.50 s.

a) \tau = \dfrac{\Delta L}{\Delta t}

   \tau = \dfrac{0.8-3}{1.5}

        τ = -1.467 N m

b) angle at which fly wheel will turn

   \theta= \omega t +\dfrac{1}{2}\alpha t^2

   \theta= \dfrac{L}{I} t +\dfrac{1}{2}\dfrac{\tau}{I}t^2

   \theta= \dfrac{3}{0.14}\times 1.5+\dfrac{1}{2}\dfrac{-1.467}{0.14}\times 1.5^2

        θ = 20.35 rad

c) work done on the wheel

     W = τ x θ

     W = -1.467 x 20.35 rad

    W = -29.86 J

d) average power of wheel

    P_{av} =-\dfrac{W}{t}

    P_{av} =-\dfrac{(-29.86)}{1.5}

     P_{av} =19.91\ W          

7 0
3 years ago
Read 2 more answers
Other questions:
  • An automobile with a radio antenna 1.0 m long generates an emf, V1, since it is traveling at 100.0 km/h in a location where the
    14·2 answers
  • The unit of length most suitable for measuring the thickness of a cell phone is a
    7·1 answer
  • How many coulombs of charge are needed to produce 29.1 mol of solid zinc?
    10·1 answer
  • Hola! necesito las respuestas de "fuerzas"
    15·1 answer
  • Anyone know number 4?
    13·1 answer
  • Which of these results in kinetic energy of an object?<br> position<br> motion<br> mass<br> volume
    9·2 answers
  • What's a diode..??? How does it act as a rectifier??
    6·1 answer
  • wo ships, one 200200 metres in length and the other 100100 metres in length, travel at constant but different speeds. When trave
    9·1 answer
  • You're holding an open house for Brenda. Walt and Mary walk in and ask you for a flyer that gives details about the property. At
    13·1 answer
  • What must the charge (sign and magnitude) of a 3.45 g particle be for it to remain stationary when placed in a downward-directed
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!