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
IgorC [24]
3 years ago
8

Student swings a small rubber stopper attached to a string over her head in a horizontal, circular path. The string is 1.50 mete

rs in length and the rubber stopper makes 120 complete circles every minute.
Physics
1 answer:
harkovskaia [24]3 years ago
4 0

Answer:

v = 18.84 m/s

Explanation:

Given that,

The length of the string, r = 1.5 m (it will act as radius)

The rubber stopper makes 120 complete circles every minute.

Since, 1 minute = 60 seconds

It means, its frequency is 2 circles every second.

Let we need to find the average speed of the rubber stopper. It can be calculated as follows :

v=\dfrac{d}{T}

d is distance, d=2\pi r and 1/T = f (frequency)

v=2\pi rf\\\\=2\pi \times 1.5\times 2\\\\=18.84\ m/s

So, the average speed of the rubber stopper is 18.84 m/s.  

You might be interested in
What is the kinetic energy in joules of a 0.05. kg bullet traveling 310 m/s
Wittaler [7]
The formula is=1/2(m x v^2)

so = 1/2*(0.05)*(310)^2

ans is =2402.5 joules
3 0
3 years ago
Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One pa
Serga [27]

Answer:

Speed of river is 0.45 m/s

Speed of boat is 2.65 m/s

Explanation:

v_r = Speed of river

v_c = Speed of canoe

v_r+v_c=2.8\ m/s

v_r-v_c=-1.9\ m/s

Adding the equations we get

2v_r=0.9\\\Rightarrow v_r=\frac{0.9}{2}\\\Rightarrow v_r=0.45\ m/s

0.42+v_c=2.8\ m/s\\\Rightarrow v_c=2.8-0.45\\\Rightarrow v_c=2.65\ m/s

Speed of river is 0.45 m/s

Speed of boat is 2.65 m/s

6 0
3 years ago
A pulled tablecloth exerts a frictional force of 0.6 n on a plate with a mass of 0.4 kg. what is the acceleration of the plate?
Ludmilka [50]
The formula for acceleration is a = F/m; Where: F = force; m = mass
Given: F = .6n; m = .4kg; a = ?
a = F/m
  = .6/.4
  = 1.5

Therefore, the acceleration of the plate is 1.5 m/s^2
6 0
3 years ago
A student stands on a scale, and the scale reads 85 N. What is being measured by the scale
Dmitry [639]

Force. Force is measured by newtons, probably because he came up with the equations to calculate force.

Hope this helps!

5 0
3 years ago
Given that both liquid A and B exert the same amount of pressure .What would be the height of column of liquid A if the density
Black_prince [1.1K]

Answer:

ans 5

Explanation:

hope it's help It seems to me

8 0
2 years ago
Other questions:
  • How large an expansion gap should be left between steel railroad rails if they may reach a maximum temperature 36.0°C greater th
    15·1 answer
  • The element copper has 29 protons. What is the atomic number of copper?
    15·2 answers
  • Holes drilled several kilometers into Earth’s crust provide direct evidence about Earth’s interior in the form of
    6·2 answers
  • How to find initial velocity in projectile motion problems when you are not given the vlocity?
    10·1 answer
  • A carpenter is driving a 15.0-g steel nail into a board. His 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. Half
    6·1 answer
  • Write<br>any<br>to increase<br>magnitude of current in dynamo​
    10·1 answer
  • Which answer best describes the concept of metabolism?
    11·2 answers
  • What are the first three harmonics of a note produced on a 0.31 m long violin string if the waves on this string have a speed of
    15·1 answer
  • You are viewing a read out of an oscilloscope that shows you when different voltages in a circuit maximize. If the period of the
    14·1 answer
  • Si un balón tiene una masa aproximada de 0.5 kg ¿con que fuerza hay que patearlo para imprimirle una aceleración de 1.5m/s2?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!