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
eimsori [14]
3 years ago
14

A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 4

.5 kg⋅m2 . A second student tosses a 2.0 kg mass with a speed of 2.5 m/s to the student on the stool, who catches it at a distance of 0.35 m from the axis of rotation. What is the resulting angular speed of the student and the stool?
Physics
1 answer:
irina [24]3 years ago
4 0

Here We can use principle of angular momentum conservation

Here as we know boy + projected mass system has no external torque

Since there is no torque so we can say the angular momentum is conserved

mvL = (I + mL^2)\omega

now we know that

m = 2 kg

v = 2.5 m/s

L = 0.35 m

I = 4.5 kg-m^2

now plug in all values in above equation

2\times 2.5 \times 0.35 = (4.5 + (2\times 0.35^2))\omega

1.75 = [4.5 + 0.245]\omega

1.75 = 4.745\omega

\omega = 0.37 rad/s

so the final angular speed will be 0.37 rad/s

You might be interested in
Several paper clips dangle from the north pole of a magnet. The induced pole in the bottom of the lowermost paper clip is a
sammy [17]

I wanna say it’s B.

4 0
3 years ago
What is the critical angle of a light beam passing drim a medium(n=2) to a medium (n=1.5)
DIA [1.3K]

Answer:

it is a sad day for rain to fall. Ill answer your question later

Explanation:

6 0
2 years ago
A football is thrown horizontally with an initial velocity of (16.6 m/s)x^. ignoring air resistance, the average acceleration of
Andrei [34K]

Solution:

According to the equations for 1-D kinematics. The only change to them is that instead one equation that describes general motion.

So we will have to use the equations twice: once for motion in the x direction and another time for the y direction.  

v_f=v_o + at ……..(a)

 [where v_f and v_o are final velocity and initial velocity, respectively]

Now ,

Initially, there was y velocity, however gravity began to act on the football, causing it to accelerate.  

Applying this value in equation (a)  

v_yf = at = -9.81 m/s^s * 1.75 = -17.165 m/s in the y direction  

For calculating the magnitude of the equation we have to square root the given value

         (16.6i - 17.165y)  

\\ \left | V  \right |=sqrt{16.6^{2}+17.165^{2}}\\ = \sqrt{275.56+294.637225}\\= \sqrt{570.197225}\\= 23.87[/tex]

5 0
2 years ago
Read 2 more answers
How to figure out the question?
Vladimir [108]

Does this help at all to answer the question

7 0
2 years ago
Raghu studies in grade 6th. He wants a cricket bat to be made by a carpenter. He tells the
kvasek [131]

Based on the information given, it can be noted that the bat was either shorter or longer than what he expected.

From the information given, it was stated that Raghu wants a cricket bat to be made by a carpenter and he tells the carpenter that the length of the bat should be 7 hand spans.

Since he got disappointed when he collected the bat, the reason for this will be because the bat was either shorter or longer than what he requested.

Learn more about length on:

brainly.com/question/25292087

8 0
2 years ago
Other questions:
  • If only some of the light that hits an object is reflected, predict what might happen to the rest of the light.
    14·1 answer
  • Luke pulls a sled using a force of 65 N for a distance of 25 m across level ground. The rope Luke pulls forms an angle of 25° wi
    12·2 answers
  • Does air pressure increase or decrease with an increase in altitude is the rate of change constant
    6·1 answer
  • The primary coil of a transformer has 200 turns and the secondary coil has 800 turns. The power supplied to the primary coil is
    12·1 answer
  • Astronomers think planets formed from interstellar dust and gases that clumped together in a process called? A. stellar evolutio
    13·2 answers
  • Suppose a person sits on a skateboard with her feet up and throws a ball. Explain why she will move as a result of throwing the
    13·1 answer
  • An 8.38 gram sample of water lost 870 J of heat. What is the change in temperature
    13·1 answer
  • A body with a mass of 5 Kg has the same kinetic energy as a second body. The second body has a mass of 10 kg and is moving at a
    14·1 answer
  • The mass of the sun is 1.99x10^30 kg . Jupiter is 7.79x10^8 km away from the sun and the mass of 1.90x10^27 kg
    8·1 answer
  • PLEASE HELP ME WITH THIS ONE QUESTION
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!