Which one of the following is not a fundamental physical quantity? a) Time c) Force b) Mass d) Length

Prove law of conservation of energy for a stone moving vertically down ( explain energy at B & C )

STALIN [3.7K]

As per given condition of point B we can see that height at point B is "h/2" from the ground

So we know that potential energy is given as

U = mgh

so here we have to put height h = h/2

so potential energy is U = mgh/2

now for kinetic energy we need to find the speed of it after falling the distance h/2

now by kinematics we will have

$v_f^2 - 0^2 = 2(g)(h/2)$

now for kinetic energy

$KE = \frac{1}{2}mv^2 = \frac{1}{2}m(gh)$

$KE = 1/2mgh$

now total energy will be given as

$E = mgh/2 + mgh/2 = mgh$

now for point C we can say that it is the point near to ground

So here height is ZERO

now potential energy will also be zero

U = 0

now for kinetic energy we need to find speed

$v^2 - 0^2 = 2(g)(h)$

now kinetic energy

$KE = \frac{1}{2}mv^2 = \frac{1}{2}m(2gh)$

$KE = mgh$

now again we have total energy

$E = 0 + mgh = mgh$

6 0

4 years ago

The ph balance is maintained by which organ?

Lena [83]

The Kidneys And Lungs.

7 0

3 years ago

During World War II, it was found that r, the radius of the shockwave produced during an atomic bomb explosion, depends on the e

cupoosta [38]

The atomic bomb explosion, depends on the energy released, W, the elapsed time, t, and the air density which altogether lead to the vaporisation of the contents within the mushroom cloud created.

<h3>What is an atomic bomb?</h3>

An atomic bomb is type of nuclear weapon that releases a vast amount of energy upon explosion in the form of fission reaction.

During an explosion of atomic bomb, a cloud of mushroom fire is formed which vaporises anything found within it. The extent of destruction depends on:

energy released, W,

the elapsed time, t, and

the air density.

Therefore, the atomic bomb explosion, depends on the energy released, W, the elapsed time, t, and the air density which altogether lead to the vaporisation of the contents within the mushroom cloud created.

Learn more about nuclear energy here:

brainly.com/question/24295936

#SPJ1

7 0

3 years ago

ASAP <br> What is elastic potential energy?

chubhunter [2.5K]

Answer:

Elastic potential energy is stored when materials stretch or compress. Examples of it include springs, rubber bands, and slingshots.

Explanation:

3 0

3 years ago

What force is required to accelerate a 1,000 kg car 5 m/s2?

marysya [2.9K]

F = ma
F = (1000 kg)•(5 m/s^2)
F = 5000 N

5 0

3 years ago

Which one of the following is not a fundamental physical quantity? a) Time c) Force b) Mass d) Length ​

Which one of the following is not a fundamental physical quantity? a) Time c) Force b) Mass d) Length