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
finlep [7]
3 years ago
13

Until a train is a safe distance from the station, it must travel at 5 m/s. Once the train is on open track, it can speed up

Physics
1 answer:
Amiraneli [1.4K]3 years ago
6 0

Answer: 5 m/s^2

Explanation: You have to use a kinematics equation that Includes what you are given. So in this case you have Initial velocity, final velocity, and time. You’re looking for acceleration so you have everything you need to use an equation, the one without distance.

You might be interested in
If a vector that is 3cm long represents 30 km/h, what velocity does a 5 cm long vector which is drawn using the same scale repre
FrozenT [24]

Answer:

False knowww yess ofcure

8 0
3 years ago
6. The image to the right shows a moment of inertia
Trava [24]

The moment of inertia is the rotational analog of mass, and it is given by

the  product of mass and the square of the distance from the axis.

  • The moment of inertia changes as the position of the weight is changed, which indicates that; statement is incorrect

Reasons:

The weight on each arm that have adjustable positions can be considered as point masses.

The moment of inertia of a point mass is <em>I</em> = m·r²

Where;

m = The mass of the weight

r = The distance (position) from the center to which the weight is adjusted

Therefore;

The moment of inertia, <em>I </em>∝ r²

Which gives;

Doubling the distance from the center of rotation, increases the moment of inertia by factor of 4.

Therefore, the statement contradicts the relationship between the radius of rotation and moment of inertia.

Learn more about moment of inertia here:

brainly.com/question/4454769

7 0
2 years ago
Jessica stretches her arms out 0.60 m from the center of her body while holding a 2.0 kg mass in each hand. She then spins aroun
Juliette [100K]

Answer:

a.) L = 2.64 kgm^2/s

b.) V = 4.4 m/s

Explanation: Jessica stretches her arms out 0.60 m from the center of her body. This will be considered as radius.

So,

Radius r = 0.6 m

Mass M = 2 kg

Velocity V = 1.1 m/s

Angular momentum L can be expressed as;

L = MVr

Substitute all the parameters into the formula

L = 2 × 1.1 × 0.6 = 1.32kgm^2s^-1

the combined angular momentum of the masses will be 2 × 1.32 = 2.64 kgm^2s-1

b. If she pulls her arms into 0.15 m,

New radius = 0.15 m

Using the same formula again

L = 2( MVr)

2.64 = 2( 2 × V × 0.15 )

1.32 = 0.3 V

V = 1.32/0.3

V = 4.4 m/s

Her new linear speed will be 4.4 m/s

4 0
2 years ago
Akia is balancing the equation Na + H2O NaOH + H2. He tries to find the coefficients that will balance the equation. How could h
bixtya [17]

Answer:

by counting each individual atom and making sure the number of each kind of atom is the same in the reactants and the products. - This is the answer.

Explanation:

3 0
2 years ago
Read 2 more answers
You are going 30 m/s in a car of mass 1000 kg when you reach a red light and stop your car.
Radda [10]

Answer:

Explanation:

The kinetic energy will convert to heat energy (provided the car has friction brakes and not regenerative brakes as might be found on an electric or hybrid) Also<u> assuming level road</u>.

E = ½mv² = ½(1000)30² = 450,000 J

5 0
2 years ago
Other questions:
  • In each case, you should demonstrate how you worked out your answer, as well as giving the answer.
    15·2 answers
  • What two parts of the eye focus light onto the retina
    13·1 answer
  • In which situation is maximum work considered to be done by a force
    9·2 answers
  • Dock walls sometimes have pillars replaced with rubber car tyres.explain how this reduces the possibility of damage what a boat
    6·1 answer
  • Will give brainliest!
    8·1 answer
  • Sonar is a device that uses reflected sound waves to measure underwater depths. If a sonar signal has a frequency of 288 Hz and
    6·1 answer
  • What are the four kinds of air uplift?
    5·1 answer
  • Please write something<br><br> What to do in case of a fire.<br> ~write a few sentences~
    14·2 answers
  • 5. Define joint<br><br> answer asap plz and ty
    6·2 answers
  • A glass rod with yellow crosses on it touches a sheet of silk covered with negative signs on it. the sheet of silk is sticking t
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!