Question

If an object of mass 10 kg moving with velocity of 20 m/s then find its kinetic energy?
And when the same object is placed 10m above the ground then find its potential energy?

Answer 1

Blood flows twice in the heart before it completes one full round. The full round thus includes pulmonary and systemic circulation. In pulmonary circulation, blood enters the lungs through pulmonary arteries. Pulmonary veins collect the blood from the lungs and carry it back to the left atrium.

In systemic circulation, blood from the left ventricle enters the aorta through which the blood is sent to the body parts. From the body parts blood is collected by veins and sent back to the heart. Therefore, the blood circulation in the human body is called double circulation.

Answer 2

Explanation:

Given , Mass of object ,m=10 kg

Velocity of object , v=20ms

−1

Initial Kinetic energy , K

1

=

2

1

×10×20

2

=2000 J

Now Final mass ,m

2

=20 kg

Final Velocity , v

2

=10m/s

Final Kinetic energy , K

2

=

2

1

×20×10

2

=1000 J

Required Ratio=

K

2

K

1

=

1000

2000

=2