2. A dog and a horse are running at the same speed. Who has more kinetic energy and why? 2. A body is thrown vertically upwards. What happens to its kinetic energy at its highest point? 3. The sum total of energy in this universe is constant. Justify this statement.
Answers
Answer: 1
If a dog and horse are running with the same speed, kinetic energy of horse is more than the kinetic energy of the dog because the mass of a horse is more than the dog. So, more the mas more the kinetic energy is.
Answer: 2
When a body is thrown vertically upwards against the force of gravity, its kinetic energy keeps on decreasing as its velocity decreases. At the maximum height, kinetic energy becomes zero, as the velocity of the body becomes zero at this moment.
Answer: 3
According to the 'Law of Conservation of Energy's the sum of all types of energy is constant. ... Therefore, it is clear that the amount of energy in the universe is constant and can neither be destroyed nor be made, but can be changed from one form to another. Energy form 1 + Energy form 2 = Constant.