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
VikaD [51]
3 years ago
9

A small metal object is tied to the end of a string and whirled round a circular path of radius 30cm. The object makes 20 oscill

ations in 5 seconds. Calculate: the angular and linear speeds of the object
Physics
1 answer:
LUCKY_DIMON [66]3 years ago
6 0

Answer:

(i) The angular speed of the small metal object is 25.133 rad/s

(ii) The linear speed of the small metal object is 7.54 m/s.

Explanation:

Given;

radius of the circular path, r = 30 cm = 0.3 m

number of revolutions, n = 20

time of motion, t = 5 s

(i) The angular speed of the small metal object is calculated as;

\omega = \frac{20 \ rev}{5 \ s} \times \frac{2 \pi \ rad}{1 \ rev} = \frac{40\pi \ rad}{5 \ s} = 8\pi \ rad/s = 25.133 \ rad/s

(ii) The linear speed of the small metal object is calculated as;

v = \omega r\\\\v = 25.133 \ rad/s \ \times \ 0.3 \ m\\\\v = 7.54 \ m/s

You might be interested in
Oceanic water particles mainly move in circles; is this movement greater on the ocean's surface or below the surface? Explain yo
goblinko [34]
I think that the oceanic water particles mainly move in circles greater in the oceans surface because of how big the waves can be and how wind and air impact the motion. The water particles move more on the surface because of the other factors that impact it such as people, wind, air, etc...
5 0
2 years ago
What galaxies would you most likely find at the center of a large cluster of galaxies?
julsineya [31]

A large elliptical galaxy

7 0
3 years ago
ATTENTION! I NEED THIS DONE ASAP NO LINKS !!!<br> THIS IS A SCIENCE QUESTION
nata0808 [166]

Answer:

Science seeks to broaden our knowledge base, while engineering designs solutions and problems.

Explanation:

4 0
2 years ago
If the sign of work is negative,
aivan3 [116]

If the sign of work is negative, that means the force and the motion are in opposite directions.

Let's say you see something roll off of the shelf. You catch it, and you let it down slowly and gently.

Gravity exerted down-force on it and it moved down. Gravity did positive work on it.

YOU exerted UP-force on it and it moved down. YOU did negative work on it.

(Also, the falling object exerted down-force on your hand, and your hand moved down. The falling object did positive work on your hand ! Where did THAT energy come from ? It came from the potential energy that the object had while it was on the shelf. Your hand absorbed that energy on the way down, doing negative work. So the object didn't have any kinetic energy when it reached the floor, and it did NOT splinter the floor or shatter in smithereens. It had barely enough energy left to make a sound when it hit the floor.)

5 0
3 years ago
the speed of sound in the air is about 340m/s. what is the wavelength of a sound wave with a frequency of 400Hz?
olga2289 [7]

Wavelength = (speed) / (frequency)

Wavelength = (340 m/s) / (400 /s)

<em>Wavelength = 0.85 meter</em>

5 0
3 years ago
Other questions:
  • The same force is applied to two skateboards. One rolls across the room and the other moves a few feet and comes to a stop. Wher
    10·2 answers
  • What is true about the inertia of two cars, Car A of mass 1,500 kilograms and Car B of mass 2,000 kilograms
    11·2 answers
  • Carbon-14 is a naturally-occuring, stable isotope that is commonly used is scientific studies as a tracer and to date artifacts.
    13·2 answers
  • A ball is fired vertically into the air. Its height in feet t seconds later is given by the formula: h(t)= -2t^2+80t
    14·1 answer
  • NEED HELP ASAP!!!
    9·1 answer
  • The electric field 2.5 mm from a uniform sheet of charge is σ=800, NC. How much charge is contained in a 5.0x5.0 cm section of t
    14·1 answer
  • A biophysics experiment uses a very sensitive magnetic field probe to determine the current associated with a nerve impulse trav
    15·1 answer
  • The current in a toaster is 20 amps, and its voltage is 200 volts. What is the resistance in the toaster?
    7·2 answers
  • Extra glucose is _____.
    9·2 answers
  • What is Archimedes principle?​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!