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
zheka24 [161]
3 years ago
14

If an object starts at rest and moves 90 meters south along a straight line for 3 seconds, what is its average velocity?

Physics
2 answers:
ICE Princess25 [194]3 years ago
7 0
I believe the answer is B
MatroZZZ [7]3 years ago
7 0
Your answer is B. 30m/s in south.
You might be interested in
how much gravitational potential energy do you give a 70 kg person when you lift him up 3 m in the air?
SCORPION-xisa [38]

Given gravitational potential energy when he's lifted is 2058 J.

Kinetic energy is transferred to the person.

Amount of kinetic energy the person has is -2058 J

velocity of person = 7.67 m/s².

<h3>Explanation:</h3>

Given:

Weight of person = 70 kg

Lifted height = 3 m

1. Gravitational potential energy of a lifted person is equal to the work done.

PE_g=W=m\times g\times h\\Acceleration due to gravity = g = 9.8 \ m/s^2 \\PE_g= m = m\times g\times h= 70\times 9.8 \times 3 = 2058\ kg.m/s^2 = 2058\ J

Gravitational potential energy is equal to 2058 Joules.

2. The Gravitational potential energy is converted into kinetic energy. Kinetic energy is being transferred to the person.

3. Kinetic energy gained = Potential energy lost = -PE_g = -2058\ kg.m/s^2

Kinetic energy gained by the person = (-2058 kg.m/s²)

4. Velocity = ?

Kinetic energy magnitude= \frac{1}{2} m\times v^2 = m\times g \times h

Solving for v, we get

v=\sqrt{2gh} =\sqrt{2\times 9.8 \times 3} = \sqrt{58.8} = 7.67 m/s^2

The person will be going at a speed of 7.67 m/s².

4 0
3 years ago
Calculate the angular velocity of the neptune (orbital period of 165 earth period) in its orbit around the sun.
ludmilkaskok [199]
The correct answer is: Angular velocity =  1.208 * 10^{-9} rad/s

Explanation:
The angular velocity is given as:
ω = \frac{2\pi}{T} --- (1)

Where T = 165 * (365 days) * (24 hours/day) * (60 minutes/hour) * (60 seconds/minute) = 5203440000 s

Plug in the value in (1):
ω = \frac{2\pi}{5203440000} = 1.208 * 10^{-9} rad/s
7 0
3 years ago
When a hypothesis is tested many times and supported by data, it becomes a __________. control theory solution conclusion
Kitty [74]
I think it would then become a theory
5 0
3 years ago
You have been called to testify as an expert witness in a trial involving a head-on collision. Car A weighs 1515 lb and was trav
serious [3.7K]

what was the speed limit, and it was 40 mph


6 0
3 years ago
What is a chunk of space rock
Igoryamba

The answer to your question is,

A meteoroid.

-Mabel <3

7 0
3 years ago
Read 2 more answers
Other questions:
  • Which of these is an example of a physical change?
    10·1 answer
  • A projectile is launched in the horizontal direction. It travels 2.050 m horizontally while it falls 0.450 m vertically, and it
    9·1 answer
  • Which word in the sentence is a helping verb Jamie could probably repair his bike by himself
    15·1 answer
  • In an inelastic collision, which of the following statements is always true?
    9·1 answer
  • Do metal atoms tend to gain or lose electrons?
    9·2 answers
  • What happens to an egg when you leave it in vinager?
    11·1 answer
  • The primary coil of a transformer contains 100 turns; the secondary has 200 turns. The primary coil is connected to a size aa ba
    14·1 answer
  • the intermolecular force of attraction increases when intermolecular space decreases .Is it true or false​
    13·1 answer
  • 4.- Una vagoneta de 1000 kg de peso parte del reposo en el punto 1 y desciende, sin rozamiento, por la vía indicada en la figura
    7·1 answer
  • Water can’t stick to itself. True or false?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!