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3 years ago

12

Please can you help?? A skydiver is falling at terminal velocity when she opens her parachute. After a while she reaches a new t

erminal velocity. How does her new terminal velocity compare to her original terminal velocity?

1 answer:

Lubov Fominskaja [6]3 years ago

7 0

It will decrease because she is loosing momentum and she will begin to slow down.

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Determine the kinetic energy of a 55kg woman running with the velocity of 5.87m/s

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3 years ago

Two marbles, one twice as heavy as the other, are dropped to the ground from the roof of a building. Just before hitting the gro

Andreyy89

Answer:

B. twice as much kinetic energy

Explanation:

Lets take the mass of the first marble =2 m

the mass of the second marble = m

We know that velocity of particle does not depends on their mass that is the velocity of both mass will be same after dropping from the roof.

We know that kinetic energy of a mass is given as

$KE=\dfrac{1}{2}Mv^2$

Kinetic energy for heavier mass

$KE=\dfrac{1}{2}\times 2m\times V^2$

Kinetic energy for light mass

$KE'=\dfrac{1}{2}\times m\times V^2$

KE=2 KE '

Form above two equation we can say that ,the kinetic energy for the heavier mass is twice the lighter mass.

Therefore the answer will be B.

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3 years ago