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USPshnik [31]
4 years ago
15

Which will be moving faster after 3.0 s, a cyclist maintaining a constant velocity of 15 m/s straight ahead or a race car accele

rating forward from a stoplight at 4.0 m/s^2"
Physics
1 answer:
zmey [24]4 years ago
5 0
Velocity of the car:

v = a*t + v₀

a Acceleration
t time
v velocity at time t
v₀ initial velocity
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Rasek [7]

When conducting a search to identify a text's credibility and reliability, you have to check the following characteristics:

  • Sources: where the information is obtained and it is supposed to be true. It is said that you need at least three different sources that explain the same information for it to be validated.

  • Is the article is current?: articles could change all the time, specially scientific ones because new discoveries can change what was discovered before, so it is important to check if the text you are reading is current or not, and if it is not, you need to check if something has changed during all those years.

<h3>Article's credibility</h3>

In this exercise, you have to present an article and describe the purpose of the source and if the article is current or not.

For example, let's select an article called "How using social media affects teenagers".

The purpose of the sources in this article is to demonstrate how social media affects teenagers using different surveys.

Check more information about sources here brainly.com/question/24708478

6 0
3 years ago
What is the standard unit of measurement for energy in physics
QveST [7]

Joule

hope this helps :)

3 0
3 years ago
How do machines increase mechanical advantage?
Kryger [21]
Mechanical advantage is a measure of the force amplification achieved by using a tool.
7 0
4 years ago
Sam's job at the amusement park is to slow down and bring to a stop the boats in the log ride.
Mashcka [7]

The amount of work which Sam does need to stop the boat is 784Joule  if boat mass  is 800kg and boat drift in 1.4m/sec.

We know that according to work-energy theorem, change in kinetic energy of the body from one speed to another is equivalent to amount of work done by all forces acting on the body.

So, here we can see that final speed of boat is =0m/sec since Sam need to stop it.

Initial speed of boat is 1.4m/sec.

Also, we know that kinetic energy is given by the below formula:

Kinetic energy=(1/2)mv²

where m is the mass of the body

and v is the speed of the body

Now, from work energy theorem, we get

=>W=(1/2)mv^2_2 - (1/2)mv^2_1

=>W=0-(1/2)×800×(1.4)²

=>W= - 400× 1.4 × 1.4

=>W = -400×1.96

=>W= -784Joule

Here negative sign denotes work has to done against the original motion of boat.

Hence, amount of work needs to be done by Sam is 784Joule.

To know more about work,visit here:

brainly.com/question/18094932

#SPJ4

3 0
1 year ago
Jack has a rock.the rock has a mass of 14g and a volume of 2cm^3.what is the density of the rock?
garik1379 [7]
It will be
d=m/v
=14/2
=7g/cm3
4 0
3 years ago
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