GK
GENERAL SCIENCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Which of the following best describes the energy of a ball as it bounces up and down?
|
|
Potential Energy and Kinetic energy change at the same time
|
|
|
Potential Energy increases as it moves down
|
|
|
Kinetic energy increases as it moves up
|
|
|
Potential Energy and Kinetic energy remains the same
|
Explanation:
Detailed explanation-1: -The answer is C. The total amount of mechanical energy is conserved in free-fall situations (no external forces doing work). Thus, the potential energy that is lost is transformed into kinetic energy.
Detailed explanation-2: -Elastic potential energy is what causes a ball to bounce, or rebound, because it is transformed into kinetic energy, which is then used to bring the ball back up.
Detailed explanation-3: -During a collision, some of the ball’s energy is converted into heat. As no energy is added to the ball, the ball bounces back with less kinetic energy and cannot reach quite the same height.
Detailed explanation-4: -The ball gains energy of motion, known as kinetic energy.
There is 1 question to complete.