Question

When a body falls down, its potential energy changes from U1 to U2. They are related as *​

Answer 1

Given:

When a body falls down , its Potential Energy changes from U1 to U2.

To find:

Relation between U1 and U2.

Calculation:

Let's assume that a body undergoes free fall, rotational energy changes from U1 to U2.

Let's assume that U1 was obtained at a height of h from the ground ; U2 was obtained at a height of h1 from the ground.

$\rm{ \therefore \: U1 = mgh\: \: .........(1)}$

$\rm{ \therefore \: U2 = mg(h1) \: \: .........(2)}$

Taking ratio of the two equations :

$\rm{ \dfrac{U2}{U1} = \dfrac{mg(h1)}{mgh} = \dfrac{h1}{h} }$

Hence required relation is :

$\boxed{ \red{ \rm{ \dfrac{U2}{U1} = \dfrac{h1}{h} }}}$

Answer 2

Answer:When a body falls its potential energy changes from U1 to U2. find the relation between them

A.  U1=U2

B.  U1

C.  U1>U2

D.  none of these

Explanation: i want answer