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
artcher [175]
2 years ago
12

In the physics lab, a block of mass M slides down a frictionless incline from a height of 35cm. At the bottom of the incline it

elastically strikes another block that is only one-half its mass. Find the velocity of block M at the bottom of the incline before the collision with the small block m.
Physics
1 answer:
bogdanovich [222]2 years ago
3 0

Solution :

Given :

M = 0.35 kg

$m=\frac{M}{2}=0.175 \ kg$

Total mechanical energy = constant

or $K.E._{top}+P.E._{top} = K.E._{bottom}+P.E._{bottom}$

But $K.E._{top} = 0$ and $P.E._{bottom} = 0$

Therefore, potential energy at the top = kinetic energy at the bottom

$\Rightarrow mgh = \frac{1}{2}mv^2$

$\Rightarrow v = \sqrt{2gh}$

      $=\sqrt{2 \times 9.8 \times 0.35}$      (h = 35 cm = 0.35 m)

      = 2.62 m/s

It is the velocity of M just before collision of 'm' at the bottom.

We know that in elastic collision velocity after collision is given by :

$v_1=\frac{m_1-m_2}{m_1+m_2}v_1+ \frac{2m_2v_2}{m_1+m_2}$

here, $m_1=M, m_2 = m, v_1 = 2.62 m/s, v_2 = 0$

∴ $v_1=\frac{0.35-0.175}{0.5250}+\frac{2 \times 0.175 \times 0}{0.525}

      $=\frac{0.175}{0.525}+0$

     = 0.33 m/s

Therefore, velocity after the collision of mass M = 0.33 m/s

 

You might be interested in
the tallest man made structure At present is theWarszawa radio massin Warsaw Poland.This radio mast rises 646m above ground near
PtichkaEL [24]

All of that fluff at the beginning is interesting, but completely irrelevant
to the question.  The question is just asking for the mass of an object
that weighs 3.6N on Earth.

                           Weight = (mass) x (acceleration of gravity)

                              3.6N = (mass) x (9.8 m/s²)

Divide each side
by  9.8 m/s :           Mass = 3.6N / 9.8 m/s² = <em>0.367 kilogram</em> (rounded)


7 0
3 years ago
A stubborn, 100 kgkg mule sits down and refuses to move. To drag the mule to the barn, the exasperated farmer ties a rope around
jolli1 [7]

Answer:

No, the farmer is not able to move the mule.

Explanation:

Mass =100 kg

Force=F=800 N

The coefficient between the mule and the ground=\mu_s=0.8

\mu_k=0.5

Static friction force,f=\mu N

Normal force=N=mg

Static friction force,f=\mu_s mg=0.8\times 100\times 9.8=784 N

Using g=9.8m/s^2

F<f

Static friction force is greater than applied force.

Therefore , the farmer is not able to move the mule.

4 0
3 years ago
A source for conducting formal research would include_
Wittaler [7]
C. written reports !
5 0
3 years ago
Read 2 more answers
Pls help! True or False?
jasenka [17]

Answer:

True

Explanation:

i hope it helps

please follow me

7 0
2 years ago
Read 2 more answers
NEED HELP ASAP
postnew [5]

Explanation:

TEMPLE HINDUS MOSQUE MUSLIMS TEMPLE HINDUS MOSQUE MUSLIMS

5 0
2 years ago
Other questions:
  • a new movie earn 114000000 in its opening weekend.express this amount in(a) gigadollars and (b) teradollars
    12·1 answer
  • If it takes 150 n of force to accelerate an object at 30 m/s what is the mass of the object
    15·1 answer
  • A cotton garment cannot keep us warm in winter as a woolen sweater can. Give <br> reason.
    5·2 answers
  • The most serious effect of radiation on humans is
    15·1 answer
  • Why is the gravitational potential energy of an object 1 meter
    12·1 answer
  • What are scientific units for describing an object that is acclerating
    14·2 answers
  • Kenna has a mass of 30 kilograms. What's her weight in newtons? Assume that acceleration due to gravity is 9.8 N/kg.
    7·1 answer
  • a person goes to his friends home at the speed of 30 km/h and comes back at the speed of 40 km/h. what was his average speed thr
    8·1 answer
  • Any change in the cross section of the vocal tract shifts the individual formant frequencies, the direction of the shift dependi
    14·1 answer
  • Water pumps use electrical energy to create mechanical energy needed to move water.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!