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
Mashcka [7]
3 years ago
12

A balloon of mass M is floating motionless in the air. A person of mass less than M is on a rope ladder hanging from the balloon

. The person begins to climbthe ladder at a uniform speed v relative to the ground. How doesthe balloon move relative to the
ground?

A. Up with speed v
B. Up with a speed less than v
C. Down with a speed less than v
D. Down with speed v
Physics
2 answers:
Tasya [4]3 years ago
6 0

Let the mass of the person be m. Total momentum is conserved (because the exterior forces on the system are balanced), especially the component in the vertical direction.

Given that,

Mass of gallon is M

Let man mass be m

Velocity of man is v

Let velocity if ballot be Vb

When the person begin to move we have

Conservation of momentum

mv + MVb=0

MVb=-mv

Vb= -(m/M) v

Given that the mass of man is less than mass of balloon. i.e. m<M

So, if m<M, then, m/M <1

Therefore, .

Vb= -(m/M) v

Vb< -v

This implies that the velocity of balloon is less than the velocity of man and if is also moving in opposite direction

So the man is moving upward, then the balloon is moving downward and it's velocity is less than the velocity of man,

The answer is C

Down with a speed less than v

SpyIntel [72]3 years ago
5 0

Given Information:

Mass of balloon = M

Mass of person = m    (m < M)

Speed of balloon = V

Speed of person = v

Required Information:

How does the balloon move relative to the  ground ?

Answer:

The balloon is moving down with speed V that is less than speed of person v.

Explanation:

Initially, the person and balloon both are at rest and no external net force on the system is acting.

The momentum is given by

Δp = FΔt

Where F is external force and if F is 0 then Δp must be 0 so that momentum is conserved.

pi = pf

The initial momentum is 0 since they were at rest initially, so the final momentum is

MV + mv = 0

MV = -mv

V = -mv/M

since m < M then m/M < 1 so

V < -v

The balloon is moving down with speed V that is less than speed of person v.

You might be interested in
Brainliest if right
mixas84 [53]
They traveling at -0.37/ms^
3 0
3 years ago
According to the barometer in the attachment below, which statement is true?
mixer [17]

Your answer is A

Pls mark me brainiest and I sure hope this helps you

8 0
2 years ago
Read 2 more answers
Three crates with various contents are pulled by a force Fpull=3615 N across a horizontal, frictionless roller‑conveyor system.
SIZIF [17.4K]

The question is incomplete. Here is the complete question.

Three crtaes with various contents are pulled by a force Fpull=3615N across a horizontal, frictionless roller-conveyor system.The group pf boxes accelerates at 1.516m/s2 to the right. Between each adjacent pair of boxes is a force meter that measures the magnitude of the tension in the connecting rope. Between the box of mass m1 and the box of mass m2, the force meter reads F12=1387N. Between the box of mass m2 and box of mass m3, the force meter reads F23=2304N. Assume that the ropes and force meters are massless.

(a) What is the total mass of the three boxes?

(b) What is the mass of each box?

Answer: (a) Total mass = 2384.5kg;

               (b) m1 = 915kg;

                   m2 = 605kg;

                   m3 = 864.5kg;

Explanation: The image of the boxes is described in the picture below.

(a) The system is moving at a constant acceleration and with a force Fpull. Using Newton's 2nd Law:

F_{pull}=m_{T}.a

m_{T}=\frac{F_{pull}}{a}

m_{T}=\frac{3615}{1.516}

m_{T}=2384.5

Total mass of the system of boxes is 2384.5kg.

(b) For each mass, analyse each box and make them each a free-body diagram.

<u>For </u>m_{1}<u>:</u>

The only force acting On the m_{1} box is force of tension between 1 and 2 and as all the system is moving at a same acceleration.

m_{1} = \frac{F_{12}}{a}

m_{1} = \frac{1387}{1.516}

m_{1} = 915kg

<u>For </u>m_{2}<u>:</u>

There are two forces acting on m_{2}: tension caused by box 1 and tension caused by box 3. Positive referential is to the right (because it's the movement's direction), so force caused by 1 is opposing force caused by 3:

m_{2} = \frac{F_{23}-F_{12}}{a}

m_{2} = \frac{2304-1387}{1.516}

m_{2} = 605kg

<u>For </u>m_{3}<u>:</u>

m_{3} = m_{T} - (m_{1}+m_{2})

m_{3} = 2384.5-1520.0

m_{3} = 864.5kg

8 0
3 years ago
According to newtos first law of motion. what is required to make a object slow down.
ladessa [460]

Answer:

Friction

Explanation:

Friction is a force that slows down moving objects. If you roll a ball across a shaggy rug, you can see that there are lumps and bumps in the rug that make the ball slow down. The rubbing, or friction, between the ball and the rug is what makes the ball stop rolling. External Force is required.

5 0
3 years ago
Why the watt is called derived unit ?​
Yuri [45]

Answer:

It is because it is a unit of Power(which is a derived quantity)

4 0
3 years ago
Other questions:
  • When the current in a coil flows in anti-clockwise direction, what pole does it create?​
    10·1 answer
  • To throw the discus, the thrower holds it with a fully outstretched arm. Starting from rest, he begins to turn with a constant a
    12·1 answer
  • Which of the following is NOT a skill scientists use to learn about the world?
    13·1 answer
  • 6. Dan wants to create acceleration. He
    12·1 answer
  • What four things affect gas pressure?
    15·1 answer
  • PLS HELP FOR PHYSICS
    15·2 answers
  • A 2.55-m-long rod, as measured in its rest frame, speeds by you longitudinally at 6.11Ã10^7. You measure its length as it passes
    5·1 answer
  • If a 50 KG object is at a location 25,600 km from Earth's Center, what is the gravitational force exerted by the objects on Eart
    10·1 answer
  • If two lines in a system of linear equations have the same slope and same y-intercept, how many solutions will the system have?
    6·1 answer
  • The use of non-renewable energy resources in the UK has changed in the last 30 years.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!