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
svetoff [14.1K]
3 years ago
9

A ball attached to a string starts at rest and undergoes a constant angular acceleration as it travels in a horizontal circle of

radius 0.30 m. After 0.65 sec, the angular speed of the ball is 9.7 rad/s. What is the tangential acceleration of the ball
Physics
1 answer:
Dmitrij [34]3 years ago
3 0

Answer:

Tangential acceleration, a_t=4.47\ m/s^2      

Explanation:

Given that,

Radius of the circle, r = 0.3 m

Initial speed of the ball, u = 0

After 0.65 sec, the angular speed of the ball is 9.7 rad/s, \omega_f=9.7\ rad/s

Let \alpha is the angular acceleration of the ball. It is given by the change in velocity per unit time as :

\alpha =\dfrac{\omega_f-\omega_i}{t}

Here, \omega_i=0 (at rest)

\alpha =\dfrac{\omega_f}{t}

\alpha =\dfrac{9.7\ rad/s}{0.65\ s}

\alpha =14.92\ rad/s^2

The tangential acceleration is given by in terms of angular acceleration as :

a_t=r\alpha

a_t=0.3\times 14.92

a_t=4.47\ m/s^2

So, the tangential acceleration of the ball is a_t=4.47\ m/s^2. Hence, this is the required solution.

You might be interested in
Volcanic and other such activity at the mid-Atlantic ridge extrudes material to fill the gap between separating tectonic plates
Svetach [21]

Answer:

Explained

Explanation:

The magnetization of rocks is found to reverse in a coordinated manner with distance from the ridge.The fact that it implies about the Earth's magnetic field is that the Earth's magnetic Field is able to reverse with time. And if  we know the rate of time for spreading we can find the rate of reversal.

3 0
4 years ago
Galileo’s pendulum theory stated that the time taken to swing through one complete cycle of a pendulum depends on what?
Wittaler [7]
It depends on the length of the pendulum and the strength of gravitational pull acting upon the pendulum.

Hope this helps!
3 0
4 years ago
Read 2 more answers
PLS HELPPPPP !!!!!!!!!!!!
dedylja [7]

Answer:

C. Grass -----> Grasshopper------>Frog

8 0
3 years ago
Read 2 more answers
A rescue airplane is diving at an angle of 37º below the horizontal with a speed of 250 m/s. It releases a survival package when
alisha [4.7K]

Answer:

<em>The correct option is 1.  720 m</em>

Explanation:

<u>Projectile Motion</u>

When an object is launched in free air (no friction) with an initial speed vo at an angle \theta, it describes a curve which has two components: one in the horizontal direction and the other in the vertical direction. The data provided gives us the initial conditions of the survival package's launch.

\displaystyle V_o=250\ m/s

\displaystyle \theta =-37^o

The initial velocity has these components in the x and y coordinates respectively:

\displaystyle V_{ox}=250\ cos(-37^o)=199.7\ m/s

\displaystyle V_{oy}=250\ sin(-37^o)=-150.5\ m/s

And we know the plane has an altitude of 600 m, so the package will reach ground level when:

\displaystyle y=-600\ m

The vertical distance traveled is given by:

\displaystyle y=V_{oy}\ t-\frac{g\ t^2}{2}=-600

We'll set up an equation to find the time when the package lands

\displaystyle -150.5t-4.9\ t^2=-600

\displaystyle -4.9\ t^2-150.5\ t+600=0

Solving for t, we find only one positive solution:

\displaystyle t=3.6\ sec

The horizontal distance is:

\displaystyle x=V_{ox}.t=199.7\times3.6=720\ m

The correct option is 1.  720 m

6 0
3 years ago
Q10. Explain the Retention time, in GC. What will happen to retention time, if you increase the detector temperature
nadya68 [22]

Answer:

The detector temperature doesn't affect retention time

Explanation:

Retention time is one of the chromatographic parameters. Is defined as the time of a compound spends from injection to detection.

A solute in GC is added to the injector where is volatilized. When volatilized, it pass through a column until the detector.

The detector temperature doesn't affect retention time. To change retention time you must change injector temperature or column temperature. An increase in column or injector temperature results in a decrease in retention time.

4 0
3 years ago
Other questions:
  • A 0.060 kg ball hits the ground with a speed of –32 m/s. The ball is in contact with the ground for 45 milliseconds and the grou
    14·2 answers
  • .A formula that contains 2 elements is called a.
    5·1 answer
  • A 5g block rests on a rough horizontal table a rope attached to the block is pulled with a force of 11N to the left as a result
    15·1 answer
  • Which statement about tornadoes is correct? a. They are a very common part of thunderstorms. b. Seventy-five percent of the worl
    9·2 answers
  • Car A (1750 kg) is travelling due south and car B (1450 kg) is travelling due east. They reach the same intersection at the same
    11·1 answer
  • A student attaches block A to a force sensor and pulls it across a frictionless table. The force on block A is
    5·2 answers
  • Charlie's father built a tree house in their backyard. He constructed a spiral staircase around the tree trunk and installed a l
    5·1 answer
  • A single force acts on a particle situated on the positive x axis. The torque about the origin is in the negative z direction. T
    10·1 answer
  • What is the displacement of the student from the bus stop to the mailbox?
    15·1 answer
  • In places of hot climate it is advised that the outer walls of houses be painted white. Explain.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!