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
Nataly_w [17]
3 years ago
5

Two​ pulleys, one with radius 2 inches and one with radius 9 inches​, are connected by a belt. If the 2-inch pulley is caused to

rotate at 5 revolutions per minute​, determine the revolutions per minute of the 9 dash inch pulley. ​ (Hint: The linear speeds of the pulleys are the​ same, both equal the speed of the​ belt.)
Physics
1 answer:
mart [117]3 years ago
4 0

Answer:

the <em>revolutions per minute</em> for the 9 inch pulley is <em>10/9</em>.

Explanation:

Step 1:

The linear speed of the belt is

linear speed = circumference × revolutions per minute, that is

v = 2π r × ω

where

  • r is the radius of the pulley
  • ω is the revolutions per minute

Therefore, the linear speed of the 2 inch pulley is:

v₂ = (2π × 2 in) × (5 rev/min)

v₂ = 4π × (5 rev/min)

Step 2:

Compute the linear speed of the belt for the 9 inch pulley:

v₈ = (2π × 9 in) × (x rev/min)

v₈ = 18π × (x rev/min)

Step 3:

Since the linear speed is the same for both pulleys, therefore

v₂ = v₈

4π × (5 rev/min) = 18π × ω₈

ω₈ = (4π × (5 rev/min)) / 18π

<em>ω₈ = 10/9 rev/min</em>

Therefore, the <em>revolutions per minute</em> for the 8 inch pulley is <em>10/9</em>.

You might be interested in
A person's resting heart rate typically lessens<br> with age.
yan [13]

Answer:

Ok

Explanation:

Please mark brainliest

8 0
3 years ago
Read 2 more answers
Hurricanes are considered____ because they lose power over cool waters or land A. Short-lived B. Heat engines C. Weak
klasskru [66]
My best guess would be heat engines
7 0
3 years ago
Read 2 more answers
What is the special name for doctors who deal with cancer?
Sladkaya [172]
Oncology is the study of cancer, so the doctors are called oncologists
8 0
3 years ago
Read 2 more answers
a mass on a spring vibrates in simple harmonic motion at an amplitude of 8.0 cm. if the mass of the object is 0.20kg and the spr
Reil [10]

Answer:

4.06 Hz

Explanation:

For simple harmonic motion, frequency is given by

f=\frac {1}{2\pi}\times \sqrt{\frac {k}{m}} where k is spring constant and m is the mass of the object.

Substituting 0.2 Kg for mass and 130 N/m for k then

f=\frac {1}{2\pi}\times \sqrt{\frac {130}{0.2}}=4.057670803\\f\approx 4.06 Hz

5 0
3 years ago
A uniformly charged thin ring has radius 15.0 cm and total charge 20.0 nC . An electron is placed on the ring's axis a distance
Ivanshal [37]

Answer:

b) 1.67×10^7 m/s

Explanation:

The solution is attached in the attachment section

8 0
3 years ago
Other questions:
  • What physical characteristic is the same for a particular substance regardless of the sample size .
    12·1 answer
  • A material that provides resistance to the flow of electric current is called a(an) (1 points)
    5·1 answer
  • A certain wire, 3 m long, stretches by 1.2 mm when under tension of 200 N. By how much does an equally thick wire 6 m long, made
    9·2 answers
  • The law of conservation of energy and describe the energy transformation that occur as you coast down a long hill on a bicycle a
    13·1 answer
  • a bird flies north with a force of 11N, the air resistance is 2N.show the vectordiagram, with the magnitude and displacement ind
    5·1 answer
  • Also need help with 20 &amp; 21 please
    13·2 answers
  • A 60.0-kg man jumps 1.70 m down onto a concrete walkway. His downward motion stops in 0.025 seconds. If he forgets to bend his k
    15·1 answer
  • HI, I really need help with this assignment for Physics:
    15·1 answer
  • When a car maintains a velocity of exactly 65 mph, what is it's acceleration​
    12·2 answers
  • #1 explain why there is no such thing as a quick and easy way to lose weight.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!