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3 years ago

12

Please select the word from the list that best fits the definition

1 answer:

My name is Ann [436]3 years ago

7 0

Answer:

glycolysis is the answer to the question

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Emmett is lifting a box vertically. Which forces are necessary for calculating the total force?

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Bess [88]

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3 years ago

A toy plane with a mass of 20 kg is flying at 10 m/s. What is its kinetic energy?

gladu [14]

Answer:

$\boxed {\boxed {\sf A. \ 1000 \ Joules}}$

Explanation:

Kinetic energy can be found using the following formula.

$E_k=\frac{1}{2}mv^2$

where <em>m</em> is the mass and <em>v</em> is the velocity.

The mass of the toy plane is 20 kilograms and the velocity is 10 meters per second.

$m= 20 \ kg \\v= 10 \ m/s \\$

Substitute the values into the formula.

$E_k=\frac{1}{2}(20 \ kg) (10 \ m/s)^2$

Solve the exponent first.

(10 m/s)²= 10 m/s *10 m/s= 100 m²/s²

$E_k=\frac{1}{2} (20 \ kg) (100 \ m^2/s^2)$

Multiply the last two numbers together.

$E_k= \frac{1}{2}(2000 \ kg*m^2/s^2)$

Multiply by 1/2 or divide by 2.

$E_k= 1000 \ kg*m^2/s^2$

1 kilogram square meter per square second is equal to 1 Joule.
Our answer of 1000 kg*m²/s² is equal to 1000 Joules

$E_k= 1000 \ J$

The kinetic energy of the toy plane is <u>1000 Joules</u>

4 0

3 years ago

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