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
AnnyKZ [126]
3 years ago
7

: A small block with mass 0.130 kg is attached to a string passing through a hole in a frictionless, horizontal surface. The blo

ck is originally revolving in a circle with a radius of 0.800 m about the hole with a tangential speed of 4.00 m/s. The string is then pulled slowly from below, shortening the radius of the circle in which the block revolves. The breaking strength of the string is 30.0 N. What is the radius of the circle when the string breaks
Physics
1 answer:
LenKa [72]3 years ago
6 0

Answer:

r = 0.0173 m = 1.73 cm

Explanation:

Here, the centripetal force of the block will be providing the required breaking tension in the string:

Tension = Centripetal Force\\T = F_c\\\\T = \frac{mv^2}{r} \\\\r = \frac{mv^2}{T}\\

where,

r = radius = ?

m = mass of block = 0.13 kg

v = tangential spee of block = 4 m/s

T = Breaking Strength = 30 N

Therefore,

r = \frac{(0.13\ kg)(4\ m/s)^2}{30\ N}

<u>r = 0.0173 m = 1.73 cm</u>

You might be interested in
Which example demonstrates constant speed with changing direction?
Darya [45]
Ffffffddddffffffffffc
3 0
3 years ago
Which of these is not a part of the<br> cardiovascular system?
lilavasa [31]

Answer:I don't see any

Explanation:

6 0
3 years ago
Read 2 more answers
a piece of metal with a mass of 15.3 grams has a temperature of 50.0°C. When the metal is placed in 80.2 grams of water at 21.0°
AleksAgata [21]

Answer:

1.21

Explanation:

Heat rise in the body happens due to heat supplied by water to the body.

Heat rise in body = m₁ c₁ ΔT₁

Where m₁ is mass of body and c₁ is its specific heat of body

Heat lost from water to the body = m₂ c₂ ΔT₂

Where m₂ is mass of water and c₂ is its specific heat of water ( c₂ =1 (since water))

Equating both:

        15.3 x c₁ x 4.3 = 80.2 x 1 x 4.3

⇒   c₁ = 80.2 / (15.3 x 4.3) = 1.21

6 0
3 years ago
Read 2 more answers
Sue and Jenny kick a soccer ball at exactly the same time. Sue’s foot exerts a force of 75.9 N to the north. Jenny’s foot exerts
Lady_Fox [76]

Answer:

Fr^2 = 75.9N+105.8N=181.7

<u><em>Fr = </em></u><u><em>181.7N.</em></u>

6 0
3 years ago
How old are the hydrogen atoms in water?
topjm [15]

Answer: 4.5 billion years

Explanation:

Some of the water molecules in your drinking glass were created more than 4.5 billion years ago, according to new research.

That makes them older than the Earth, older than the solar system — even older than the sun itself.

8 0
3 years ago
Read 2 more answers
Other questions:
  • There are usually _________ collisions in a motor vehicle crash.
    5·1 answer
  • What is flens, the focal length of the lens? if the lens is converging flens is positive. it the lens is diverging, flens is neg
    15·1 answer
  • a sprinter's whose mass is 70 kg accelerstes from rest to 11 m/s in 6 seconds what is the acceleration what force did this requi
    12·1 answer
  • What type of image is formed by a lens if m = -2.0?
    12·2 answers
  • Karen runs sets in basketball practice. She starts from a line runs 2.0 m, returns to the line, runs 4.0 m, to the line, runs 6.
    12·1 answer
  • A proton is suspended in the air by an electric field at the surface of Earth. What is the strength of this electric field?
    9·1 answer
  • What is the kinetic energy of a 30 kg falling object when the object reaches a velocity of 20 m/s?
    7·1 answer
  • Example of third class Lever first class Lever and second class Lever​
    5·2 answers
  • A hoist lifts a 1200 N object a vertical distance of 15 m in 15 s. 18,000 J of work is done on the object to raise it at a const
    13·1 answer
  • What happens to the density of a fluid as it temperature increases/decreases?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!