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
Airida [17]
3 years ago
11

A 0.25-kg ball attached to a string is rotating in a horizontal circle of radius 0.5 m. If the ball revolves twice every second,

what is the tension in the string?
Physics
1 answer:
Aloiza [94]3 years ago
4 0

Answer:

19.74 N

Explanation:

mass of ball (m) = 0.25 kg

radius (r) = 0.5 m

time (t) = 2 revolutions per seconds = 1/2 = 0.5 second per revolution

find the tension in the string

tension (T) = \frac{mv^{2} }{r}

  • where velocity (v) = \frac{2πr}{t}

tension now becomes (T) = \frac{m}{r} x (\frac{2πr}{t})^{2}

tension (T) = \frac{4π^{2}rm }{t^{2} }

  • now substituting the values of mass (m), time (t) and radius (r) into the equation above we have

tension (T) = \frac{4π^{2}x0.5x0.25}{0.5^{2} }

tension (T) =  2π^{2} =   2x3.142^{2} = 19.74 N

You might be interested in
Object 1 has a mass of 7.0kg and a initial velocity of 17.0 m/s. Object 2 has a mass of 8.0kg and a initial velocity of -14.0 m/
Naily [24]

\\ \sf\longmapsto m1v1+m2v2=(m1+m2)v3

\\ \sf\longmapsto 7(17)+8(-14)=(7+8)v3

\\ \sf\longmapsto 119-112=15v3

\\ \sf\longmapsto 15v3=7

\\ \sf\longmapsto v3=7/15

\\ \sf\longmapsto v3=2.1m/s

4 0
2 years ago
Which can be observed both on Earth and in an accelerating ship in space that is free from the effect of any gravitational field
Reil [10]

Answer:

  • apples falling from trees
  • people's feet touching the ground
  • sky divers moving toward the ground  
  • balls bending downward after being thrown​

Explanation:

When a space ship is accelerating in space, there is a force known as Inertia that kicks in. Inertia will mirror the effects of gravity on the ship even if there is no gravitational field effect such that anything that would happen where there is gravity, would continue to happen.

This means that apples will fall from trees, people's feet will touch the ground, sky divers will be pulled downwards and balls will bend downwards when thrown as well. These are the same effects expected on earth where gravity pulls things towards the earth's core.

8 0
2 years ago
Read 2 more answers
Selena drew a diagram to show how current moves in a loop of wire that is placed between two magnets. At top left a piece of mag
OLEGan [10]

Answer:

B on Edge 2020

She can change the arrows so they show current traveling in opposite directions on the sides of the loop.

Explanation:

Just took the test haha

5 0
2 years ago
Read 2 more answers
____ is the detection of halo objects like brown dwarfs when their gravitational fields concentrate the light of distant sources
maksim [4K]

Answer:

Microlensing.

Explanation:

This techniques is called Microlensing.

Microlensing is a method of gravitational lensing where light from a backdrop point of origin is curved to develop distorted, numerous and/or lightened images by the gravity field of a foreground lens.

This method is very effective in discovering planets that are far-far from earth.It is actually an astronomical effect that was predicted by Albert Einstein's general theory of relativity.

7 0
3 years ago
3 m/s north is an example of a(n) ____.
alexandr1967 [171]
Rate of speed (3 m/s north is three miles per second north, so it's a rate of speed)
4 0
3 years ago
Read 2 more answers
Other questions:
  • Which scientist was the first to accurately measure the speed of light?
    10·2 answers
  • Two flat surfaces are exposed to a uniform, horizontal magnetic field of magnitude 0.47 T. When viewed edge-on, the first surfac
    15·1 answer
  • A playground ride consists of a disk of mass M = 49 kg and radius R = 1.7 m mounted on a low-friction axle. A child of mass m =
    11·1 answer
  • Two point charges carrying charges q1 = +3 μC and q2 = −4 μC are fixed on the x − y plane at positions (x1 = 3.5 cm, y1 = 0.5 cm
    5·1 answer
  • All of the planets in Earth's solar system must follow the same plane of motion. What's this plane called? A. Plane of the eclip
    6·2 answers
  • Light with a wavelength of λ = 614 nm is shone first on a single slit of width w = 3.75 μm. The single slit is then replaced wit
    11·1 answer
  • Which element is this?
    8·2 answers
  • What's the effect of mass and speed on kinetic energy
    5·1 answer
  • Eee A student conducts an investigation to determine how the force of gravity affects different objects dropped from different h
    12·1 answer
  • In part a, (a) why did you set the frequency of the square wave to 0.40 hz? (b) what would have happened if you had set the freq
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!