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Dvinal [7]
2 years ago
12

Một vật chuyển động từ A đến B cách nhau 90m . Trong nữa đoạn đường đầu vật đi với vận tốc v2 =5m/s , giữa đoạn đường còn lại vậ

t chuyển động với vận tốc v2=3m/s. Sau bao lâu vật đến B
Physics
1 answer:
Rainbow [258]2 years ago
6 0

お前なに言ってんのか全然わかんない...

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If we interpret the large, angular rocks to have originated from the outcrop at the top of the hill, we are using __________ rea
IrinaK [193]

The reasoning which is in use when large, angular rocks are interpreted to have originated from the outcrop at the top of the hill is; Fossil succession

<h3>Fossil succession of rocks</h3>

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On this note, any time period can be dated by its fossil content.

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Spider-Man and Ned were testing the distance he could shoot his web depending on the angle at which he points his web shooter. H
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3 0
3 years ago
Read 2 more answers
What is the definition of work when net force is parallel to the distance?
goldfiish [28.3K]
Work in general is given by W=F·d where F is the force vector and d is the displacement vector.  The dot symbol is the dot product which is a measure of how parallel two vectors are.  It can be replaced by the cosine of the angle between the two vectors and the vectors replaced by their magnitudes.  If F and d are parallel then the angle is zero and the cosine is unity.  So in this case work can be defined as the product of the magnitudes of the force and distance:
W=Fd
6 0
2 years ago
Why is disagreement among scientists important to the progress of science?
Murrr4er [49]
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8 0
3 years ago
How much work is done in accelerating a 2000 kg car from rest to a speed of 30 m/s?
Otrada [13]
The work done is the same as the amount of energy increase. The formula for kinetic energy is 122
1
2
m
v
2
.

The initial KE of the car is 12(1000)×202=200,000
1
2
(
1000
)
×
20
2
=
200
,
000
joules.

The final KE of the car is 12(1000)×302=450,000
1
2
(
1000
)
×
30
2
=
450
,
000
joules.

The difference between these is the amount of work done: 450,000−200,000=250,000
450
,
000
−
200
,
000
=
250
,
000
joules.
14.2K viewsView upvotes

20



3
8 0
2 years ago
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