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
saveliy_v [14]
3 years ago
13

HELP 50 POINTS

Physics
2 answers:
Pie3 years ago
8 0

Answer:

D

Explanation:

Inga [223]3 years ago
7 0

Answer:

A

Explanation:

When you pull the string the weight will experience a downward force and come closer to the vertical tube. And the angle between weight and hand through string is decreased so the angular velocity decreases

You might be interested in
An object is dropped on Earth from a height of 15 m. How long did it take for the object to reach the ground?
DanielleElmas [232]
VA and I will not do this if they don't want it and you are a little
3 0
3 years ago
Which planet in our solar system, discovered in 1781, was named after the greek god of the sky?.
Anon25 [30]

Answer:

i think the planet is Uranus

3 0
1 year ago
The law of conservation of momentum states that the total momentum of interacting objects does not _______. This means the total
Nata [24]

Explanation:

Law of conservation of momentum states that in an isolated system when two objects collide with each other then total momentum before and after the collision is equal.

Thus, we can conclude that the law of conservation of momentum states that the total momentum of interacting objects does not change. This means the total momentum before a collision or explosion is equal to the to momentum after a collision or explosion.

5 0
2 years ago
Read 2 more answers
A rock is thrown from the top of a 20-m building at an angle of 53° above the horizontal. If the horizontal range of the throw
NemiM [27]

Answer:

28.5 m/s

18.22 m/s

Explanation:

h = 20 m, R = 20 m, theta = 53 degree

Let the speed of throwing is u and the speed with which it strikes the ground is v.

Horizontal distance, R = horizontal velocity x time

Let t be the time taken

20 = u Cos 53 x t

u t = 20/0.6 = 33.33 ..... (1)

Now use second equation of motion in vertical direction

h = u Sin 53 t - 1/2 g t^2

20 = 33.33 x 0.8 - 4.9 t^2     (ut = 33.33 from equation 1)

t = 1.17 s

Put in equation (1)

u = 33.33 / 1.17 = 28.5 m/s

Let v be the velocity just before striking the ground

vx = u Cos 53 = 28.5 x 0.6 = 17.15 m/s

vy = uSin 53 - 9.8 x 1.17

vy = 28.5 x 0.8 - 16.66

vy = 6.14 m/s

v^2 = vx^2 + vy^2 = 17.15^2 + 6.14^2

v = 18.22 m/s

6 0
3 years ago
To drive a car at a constant velocity, you
kipiarov [429]

Answer:

the answer is C

Explanation:

The car, first is at rest and if you don't accelerate it won't move. When to hit the gas it will accelerate from rest

8 0
2 years ago
Other questions:
  • Alan always turns the aquarium light on before putting fish food into the tank. after a while, he notices that the fish swim to
    12·1 answer
  • From Kepler's third law, an asteroid with an orbital period of 8 years lies at an average distance from the Sun equal to From Ke
    12·1 answer
  • What type of energy transformation takes place in bicycle.
    14·1 answer
  • When Bob needs to send Alice a message with a digital signature, whose private key is used to encrypt the hash?
    10·1 answer
  • Astronauts increased in height by an average of approximately 40 mm (about an inch and a half) during the Apollo-Soyuz missions,
    6·1 answer
  • Please help!!! Will give u Brainliest
    13·1 answer
  • The principle of conservation of linear momentum can be strictly applied during a collision between two particles provided the t
    15·1 answer
  • Can someone please help me with science.
    11·1 answer
  • Which of the following elements is more reactive than the others
    9·1 answer
  • explain how a deflection magnetometer can be used to find the horizontal component of the Earth's magnetic field​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!