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
vodka [1.7K]
3 years ago
12

An object is hanging by a string from the ceiling of an elevator. The elevator is moving upward with a constant speed. What is t

he magnitude of the tension in the string?
The magnitude of the tension in the string is equal to the magnitude of the weight of the object.
The magnitude of the tension in the string is less than the magnitude of the weight of the object.
The tension in the string cannot be determined without knowing the speed of the elevator.
The magnitude of the tension in the string is greater than the magnitude of the weight of the object.
The tension in the string is zero.
Physics
1 answer:
xeze [42]3 years ago
8 0

Answer:

The magnitude of the tension in he string is equal to the magnitude of the weight of the object.

Explanation:

According to the Newton's 1st law, An object will remain at rest or in uniform motion in a straight line unless acted upon by an unbalanced force.

In here, the elevator is moving with a constant speed. So the object must have the equal constant speed. Which means, it has a uniform motion. According to Newton's 1st law, the total unbalanced force on the object must be zero . As we know, there are only two forces are on the object and they are,

The tension in string(T)   ,   The weight of the object(W) .

                                  ∴ F    =   0

                                 T  -  W  =   0

So to balanced those forces, the magnitude of the tension in the string must be equal to the magnitude of the weight of  the object.  

       

You might be interested in
A jogger runs 5 km in 0.6 h, then 9 km in 0.5 hr. What is the average speed of the jogger
vesna_86 [32]

Note: The values given in the answer are rounded off to the nearest hundredth.

7 0
2 years ago
an aircraft has a liftoff speed of 53 m/s. what is the minimum constant acceleration an airplane must have to reach that takeoff
xxMikexx [17]

Answer:

a=3.34\ m/s^2

Explanation:

<u>Accelerated Motion </u>

It refers to the motion of objects in which velocity is not constant over time. If the change of the velocity occurs at the same rate, then we say it's uniformly accelerated. Being   v_o= initial speed, v_f= final speed, a= constant acceleration, x= distance traveled

Then, the scalar relation between them is

v_f^2=v_o^2+2ax

The aircraft needs to reach a liftoff speed of 53 m/s from rest (assumed) having only 420 meters to do so. We can compute the acceleration by solving for a

\displaystyle a=\frac{v_f^2-v_0^2}{2x}

\displaystyle a=\frac{53^2-0^2}{2(420)}

\boxed{a=3.34\ m/s^2}

6 0
3 years ago
Dolphins communicate using compression waves (longitudinal waves). Some of the sounds dolphins make are outside the range of hum
Sphinxa [80]
Water is a really good conductor of sound so I would have to say that it would be to send the message underwater because a more dense medium produces a louder sound
8 0
3 years ago
Help me plssssssss cause I’m struggling
krok68 [10]

Answer:

I am pretty sure it is C

Explanation:

It can be found all over the universe

5 0
3 years ago
Read 2 more answers
A device that changes mechanical energy to electrical energy by rotating a coil of wire through a magnetic field is called a(an)
tigry1 [53]
A device that changes mechanical energy to electrical energy by rotatin a coil of wire through a magnetic field is called B. Generator
4 0
3 years ago
Read 2 more answers
Other questions:
  • Find the voltage across and power absorbed by the 25 ohm resistor.
    12·1 answer
  • a 3.46 kg box is sitting at rest on a flat floor. a.) what is the weight of the box. b.) what is the normal force on the box
    9·1 answer
  • i need the answer asap plz A child rides her bike at a rate of 12.0 km/hr down the street. A squirrel suddenly runs in front of
    7·2 answers
  • Does time machine really exist?
    6·2 answers
  • Nicole throws a ball straight up. Chad watches the ball from a window 6.10m above the point where Nicole released it. The ball p
    11·1 answer
  • What causes an atom to be neutral? Equal number of protons and neutrons Equal distance between the nucleus and electrons Equal n
    10·1 answer
  • A refrigerator is removing heat from a cold medium at 3∘C at a rate of 5400 kJ/h and rejecting the waste heat to a medium at 30∘
    15·1 answer
  • You put a 3 kg block in the box, so the total mass is now 9 kg, and you launch this heavier box with an initial speed of 5 m/s.
    14·1 answer
  • Which part of a transverse wave is similar to a compression in a longitudinal<br> wave?
    15·1 answer
  • Change.<br> Wax melting is an example of a chemical reaction.<br> True or false
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!