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
Nezavi [6.7K]
3 years ago
12

You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is

Physics
2 answers:
Arlecino [84]3 years ago
8 0

Answer:

a) v=0.5405\ m.s^{-1}

b) v_p'=0.1143\ m.s^{-1}

Explanation:

Given:

mass of ball, m_b=4\ kg

initial speed of the ball, v_b=10\ m.s^{-1}

mass of the person, m_p=70\ kg

a)

Using the conservation of linear momentum:

When the person catches the ball, assuming that the person catches it with an impact without absorbing the shock.

m_b.v_b=(m_b+m_p)v

4\times 10=(4+70)\times  v

v=0.5405\ m.s^{-1}

b)

When the ball hits the person and bounces off with the velocity of v_b'=8\ m.s^{-1}.

Using the conservation of linear momentum:

m_b.v_b+m_p.v_p=m_b.v_b'+m_p.v_p'

where:

v_b'= final speed of the ball after collision

v_p'= final speed of the person after collision

v_p= initial velocity of the person = 0

putting the respective values in the above eq.

4\times 10+0=4\times 8+70\times v_p'

v_p'=0.1143\ m.s^{-1}

bazaltina [42]3 years ago
5 0

Answer:

Explanation:

mass of ball, m = 0.4 kg

initial velocity of ball, u = 10 m/s

your mass, M = 70 kg

your initial velocity, U = 0 m/s

(a)

As there is no external force is applied so the linear momentum of the ball and you is conserved.

Let the final velocity of ball and you is V.

So,

Initial Momentum of ball = final momentum of ball and you

m x u = ( M + m) V

0.4 x 10 = ( 70 + 0.4) x V

4 = 70.4 V

V = 0.057 m/s

Thus, your speed is 0.057 m/s after catching the ball.

(b) v' = - 8 m/s

Let V' is the final velocity of you.

Momentum of system before collision = Momentum of system after collision

( 70 + 0.4) x V = m x v' + M x V'

70.4 x 0.045 = - 0.4 x 8 + 70 x V'

4 = - 3.2 + 70 V'

V' = 0.1 m/s

Thus, your speed is 0.1 m/s towards right after hitting by the ball.

You might be interested in
How do weathering process affect deserts?
Damm [24]
Water and wind cause mechanical weathering and produce angular rocks, sheer canyon walls, and pebble-covered surfaces.
4 0
3 years ago
Which of the following is an electromagnetic wave characteristic which is similar to a particle
Alenkinab [10]

Answer: Photoelectric wave

Explanation: Because it represents an interaction between light and matter that describes light as an electromagnetic wave.

6 0
3 years ago
The talk test can be used to measure the __________. A. knowledge of an activity B. intensity of an activity C. length of an act
gladu [14]
The answer would be A
4 0
3 years ago
Read 2 more answers
I am unable to understand from question no 3 and I have assignment due :( in 2 days need to do till 9
ludmilkaskok [199]

Answer:

Oh well have your parents do something bout that. They are there to help you. Or guardian they all shall help you that is what they are there for. They are they to take care of you, answer you questions, and last but not least, they are there to also raise you. Ask you mom, dad, guardian, and maybe even you teacher to post pone the date. Teachers are to help you. Your guardian is to watch you make sure your safe while your parents are away (bascially like raising you). And parents to raise you, make sure you safe, and many other things like to make sure you are fed.

Explanation:

I hope they all have some type of help for you.

8 0
3 years ago
What is the difference between air resistance and friction? ​
Vladimir [108]

Answer:Friction is a force that opposes the motion of objects; friction can cause objects to slow down. Air resistance is a type of friction. Air resistance causes moving objects to slow down. Different physical properties, such as the shape of an object, affect the air resistance on an object.

Explanation:

5 0
1 year ago
Other questions:
  • Brain-powered cars may most likely reduce
    14·1 answer
  • What type of motion does the galaxy go through
    15·1 answer
  • Which is described as the flow of charge particles?
    14·1 answer
  • Average velocity is different than average speed because calculating average velocity involves
    9·2 answers
  • Choose the appropriate words to complete the thought. A solar powered car converts _______________ energy into _________________
    14·1 answer
  • What property of most stars can be determined by their color?
    13·1 answer
  • What is the term for substances that have several unpaired electrons and are strongly magnetic
    5·1 answer
  • free p-o-i-n-t-s if you done the last one dont do this one dont do this one yet ill tell you when you can do it bc im trying to
    14·1 answer
  • A car starts from rest and accelerates uniformly over a time of 7.25 seconds for a distance of 210 m. Determine the acceleration
    5·1 answer
  • Name three (3) organelles that are found in plant cells that are not commonly found in animal cells?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!