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
lukranit [14]
3 years ago
9

An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s ). If a particular disk is spun at 235

.6 rad/s while it is being read, and then is allowed to come to rest over 0.167 seconds , what is the magnitude of the average angular acceleration of the disk? average angular acceleration: rad s 2 If the disk is 0.12 m in diameter, what is the magnitude of the tangential acceleration of a point 1 / 3 of the way out from the center of the disk? tangential acceleration
Physics
1 answer:
Tamiku [17]3 years ago
7 0

Answer:

Part(a): The angular acceleration is \bf{1410.78~rad/s^{2}}.

Part(b): The linear acceleration is \bf{28.21~m/s^{2}}.

Explanation:

Given:

The angular velocity, \omega  = 235.6~rad/s

Time taken, t = 0.167~s

Diameter of the disk, d = 0.12~m

Radius of the concerned point, r_{p} = \dfrac{1}{3}(d/2).

Part(a):

The angular acceleration (\alpha) is given by

\alpha &=& \dfrac{\omega}{t}\\&=& \dfrac{235.6~rad/s}{0.167~s}\\&=& 1410.78~rad/s^{2}

Part(b):

The radius (r_{p}) of the concerned point is given by

r_{p} &=& \dfrac{1}{3}\dfrac{0.12~m}{2}\\&=& 0.02~m

Linear acceleration (a) is give by

a &=& \alpha \times r_{p}\\&=& (1410.78~rad/sec)(0.02~m)\\&=& 28.21~m/s^{2}

You might be interested in
What two main gasses are exchanged during the process of breathing??
Zina [86]
Oxygen and carbon dioxide
4 0
3 years ago
A wheel has a constant angular acceleration of 4.5 rad/s2. during a certain 5.0 s interval, it turns through an angle of 128 rad
dalvyx [7]
The solution for this problem is through this formula:Ø = w1 t + 1/2 ã t^2 
where:Ø - angular displacement w1 - initial angular velocity t - time ã - angular acceleration 
128 = w1 x 4 + ½ x 4.5 x 5^2 128 = 4w1 + 56.254w1 = -128 + 56.25 4w1 = 71.75w1 = 71.75/4
w1 = 17.94 or 18 rad s^-1 
w1 = wo + ãt 
w1 - final angular velocity 
wo - initial angular velocity 
18 = 0 + 4.5t t = 4 s
3 0
3 years ago
Which relations below regarding magnetic field and electric field lines are true? 1. Magnetic field lines never begin nor end bu
Vlad1618 [11]

Answer:

Options 1 and 5 are correct

Explanation:

Magnetic field lines can never cross, the field is unique at any point in space. Magnetic field lines are continuous, forming closed loops without beginning or end. They go from the north pole to the south pole.

Magnetic field lines form closed loops but do not intersect.

Electric field lines originate at the positive charges and terminate at the negative charges. They move in a straight line and are parallel. Electric field lines neither form closed loops nor intersect.

Since, magnetic field lines form closed loops and move from North to South pole, they come out of north poles outside the magnet and into north poles inside the magnet, they also go into south poles outside the magnet and out of south poles inside the magnet.

3 0
3 years ago
What is special about nitrogen, and what is its main function in the atmosphere
Vlad [161]
Nitrogen is the most abundant of the gases present in the atmosphere. 78 percent of the atmospheric air comprises of nitrogen, oxygen makes up for 21 percent and all other gases make up for the remaining one percent. Oxygen is a highly flammable gas and in the absence of nitrogen it would not have been possible to utilize this atmospheric oxygen, hence the presence of nitrogen reduces its flammability and also neutralizes the toxicity of other gases.
5 0
3 years ago
Sound is a disturbance that travels through a medium as a
Vinvika [58]

Answer:

Sound waves. Anything that vibrates is producing sound; soundis simply a longitudinal wave passing through a medium via the vibration of particles in themedium. Consider a sound wavetraveling in air

5 0
3 years ago
Other questions:
  • How are voltage (V), current (I), and resistance (R) related?
    6·2 answers
  • The line spectrum of lithium has a red line at 670.8 nm. Calculate the energy of a photon with this wavelength.
    7·1 answer
  • A car accelerates from rest to 34 m/s in just 12 seconds. what is is acceleration?
    9·2 answers
  • A positively charged particle initially at rest on the ground accelerates upward to 160 m/s in 2.10 s. The particle has a charge
    6·2 answers
  • How fast is a cat that runs 3 kilometers in 0.5 hours
    14·1 answer
  • a given box of 2 kg is in contact with the floor experiences an applied force of 150 form somebody pushing it.while in motion,it
    15·1 answer
  • You walk for a speed of 1.1 m/s (meters per second) for 6.0 seconds and
    15·1 answer
  • You measure my life in hours and I serve you by expiring. I’m quick when I’m thin and slow when I’m fat. The wind is my enemy.
    5·1 answer
  • An unbalanced force of 20N acts on a 4.0kg mass what is it's acceleration​
    6·1 answer
  • A 0.05 kg arrow is fired at a velocity towards a 1.2 kg apple. The arrow sticks in the apple and both move at 3.6
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!