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
marta [7]
2 years ago
14

A child swings with a small amplitude on a playground with a 2.5m long chain.

Physics
1 answer:
viva [34]2 years ago
5 0
A) T=2*pi(L/g)^1/2
T=2*3.14(2.5/9.81)^1/2
T=3.171s
b) T=1/f
f=1/3.171
f=0.315Hz
You might be interested in
Does a sled have inertia while sitting still
madam [21]

Answer:

Yes, a sled has inertia while sitting still.

Explanation:

From Newton's law of inertia, an object at rest will remain at rest unless it is acted upon by an external force. The reason the object will remain at rest unless an external force acts is because of inertia. Inertia means the resistance of an object to motion.

Thus, a sled hammer at rest will remain at rest unless it is acted upon by an external force. So we can conclude that it has Inertia.

7 0
3 years ago
In space movies, spacecrafts explode and oxygen is needed for a fire to start. Why is it wrong? What would really happen?
Triss [41]

Answer:

Hey

The reason these "space movies" are wrong is because objects in "space" (not in a "space" craft) can't catch on fire because there is no air in "space".

6 0
3 years ago
What is a sloping surface, like a ramp, that reduces the amount of force required to do work.
puteri [66]
If this is about simple machines the answer is: Inclined plane
6 0
3 years ago
A bullet leaves a gun with a horizontal velocity of 100 m/s. Calculate the distance it would travel in 1.3 seconds.
salantis [7]

Answer:

130m

Explanation:

You just have to multiply velocity by the time traveled:

100m/s * 1.3s = 130m!

5 0
3 years ago
Read 2 more answers
You have a grindstone (a disk) that is 95.2 kg, has a 0.399 m radius, and is turning at 93 rpm, and you press a steel axe agains
olya-2409 [2.1K]

Answer:

angular acceleration is -0.2063  rad/s²

Explanation:

Given data

mass m = 95.2 kg

radius r = 0.399 m

turning ω = 93 rpm

radial force N  = 19.6 N

kinetic coefficient of friction  μ = 0.2

to find out

angular acceleration

solution

we know frictional force that is = radial force × kinetic coefficient of friction

frictional force = 19.6 × 0.2

frictional force = 3.92 N

and

we know moment of inertia  that is

γ =  I ×α = frictional force × r

so

γ  = 1/2 mr²α

α  = -2f /mr

α  = -2(3.92) /95.2 (0.399)

α  = - 7.84 / 37.9848 = -0.2063

so angular acceleration is -0.2063  rad/s²

3 0
3 years ago
Other questions:
  • A velocity vs. time graph is shown. A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 5, ve
    13·2 answers
  • Which numbers on the ph scale indicate an acid
    8·1 answer
  • Describe the structure of an atom
    8·1 answer
  • What impulse occurs when an average force of 7.0 N is exerted on a cart for 2.5 s ?
    14·1 answer
  • Which phrases describe all the outer planets’ motion? Select two options.
    12·2 answers
  • Why the bicycle stops when the cyclist stops pedaling?
    5·2 answers
  • What would you do if someone came up atta nowhere and stole your kneecaps, what do you do?
    13·1 answer
  • Please Help Me!!!!!!​
    6·1 answer
  • State two devices that transfer heat out of a cool environment into a warm environment​
    10·1 answer
  • Quick an answer correct answer!<br><br><br><br> ----------------
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!