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julsineya [31]
3 years ago
13

Which of the following is not a velocity?*

Physics
2 answers:
Ipatiy [6.2K]3 years ago
5 0

50 mph is not a velocity bcos it doesn't have direction

ira [324]3 years ago
3 0

Answer:

50 mph

Explanation:

doesn’t have direction

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You place the spring vertically with one end on the floor. You then lay a 1.60 kg book on top of the spring and release the book
malfutka [58]

Answer:

Compression in the spring, x = 3.7 cm

Explanation:

It is given that,

Mass of the book, m = 1.6 kg

It can be assumed the spring constant of the spring is, k = 840 N/m

As the book moves down, the change in potential energy of the book is converted to spring potential energy of compression. The mathematical expression is as follows :

\dfrac{1}{2}kx^2=mgx

x=\dfrac{2mg}{k}

x=\dfrac{2\times 1.6\ kg\times 9.8\ m/s^2}{840\ N/m}  

x = 0.037 meters

or

x = 3.7 cm

So, the spring is compressed to a distance of 3.7 cm. Hence, this is the required solution.

4 0
3 years ago
You have been hired to design a spring-launched roller coaster that will carry two passengers per car. The car goes up a 12-m-hi
Vlada [557]

Answer:

Vmax=11.53 m/s

Explanation:

from conservation of energy

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   0.5*k*2.3²= 430*9.81*6

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For safety reason

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agsin from conservation of energy

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    spring potential energy=change in kinetic energy

   0.5*k"*x²=0.5*m*V_{max}^{2}

      10812.88 *2.3²=430*V_{max}^{2}

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5 0
3 years ago
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Answer:

The correct answer is c. More total rainfall from a slower moving storm.

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Explanation:

6 0
3 years ago
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Can somebody re-answer the true and false questions!!!
stiv31 [10]

Answer:

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