Question

Questions Based on High Order Thinking Skills (HOTS)

47. A ball falls to the ground as shown below:
A. ●. potential energy = 80J kinetic enargy = 0
B. ● kinetic energy = 48J

C. ● potential anergy = 0

(a) What is the kinetic energy of ball when it hits the ground?


(b) What is the potential energy of ball at B?


(c) Which law you have made use of in answering this question ?​

Answer 1

Answer:

$\huge \bf \red {answer}$

a) The kinetic energy of ball when it hits the ground will be equal to the potential energy of the ball when it was about to be made to fall. Hence, the kinetic energy will be 80J.

b) The potential energy of ball at position B will be,

PE= 80 - 48

= 32J

c) With the help of law of conservation of energy which states that energy can neither be created not be destroyed but can only be changed from one form to another, the above answers can be found. Since, the total energy will remain constant in all the three given stages.

Hope this helps you