2 years ago

Please help it’s multiple choice

Physics

1 answer:

Goryan [66]2 years ago

4 0

Explanation:

the answer is object with more mass have more kinetic energy

K/E=(1/2)mv²

it cant be the last option because it was stated in the question that the velocity is the same

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For the following questions, imagine the book drops in free fall and falls a distance d. For the system of the book and earth, t

alukav5142 [94]

Answer:

C) is zero

Explanation:

According to the law of energy conservation, the total mechanical energy of the object is conserved. A book falling a distance d would have a change in potential energy, resulting in the same change in kinetic energy. But the total mechanical energy must be the same. So there's 0 change in total energy of the system.

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2 years ago

A bird flying straight upward at 5 m/s drops a berry when it is 300 m above the ground. How fast is the berry going when it hits

Nikitich [7]

Answer:

v=77.62 m/s

Explanation:

Given that

h= - 300 m

speed of the bird ,u= 5 m/s

Lets take Speed of the berry when it hit the ground = v m/s

we know that ,if object is moving upward

v² = u² - 2 g h

u=Initial speed

v=Final speed

h=Height

Now by putting the values

v² = u² - 2 g h

v² = 5² - 2 x 10 x (-300) ( take g = 10 m/s²)

v² =25 + 20 x 300

v² ==25 + 6000

v² =6025

v=77.62 m/s

Therefore the final speed of the berry will be 77.62 m/s.

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2 years ago

Individuals with favorable traits are ________ in an environment

77julia77 [94]

Succesful is correct.

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2 years ago

What happens to helium balloons when you let them go?

Ber [7]

They will rise to the 2nd layer of the atmosphere where the temperature decreases by a lot and then they will blow up

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3 years ago

Read 2 more answers

Help<br> A. 12,240<br> B. 6,120

nata0808 [166]

Answer:

A. 12,240.

Explanation:

1,530 times 8.0 = 12,240.

hope this helped :)

3 0

2 years ago