Question

Derive mathematical formula of kinetic energy for class 9

Answer 1

Explanation:

we know that

W= Fs

according to Newton's second law of motion

F=ma

W = ma× s

we have

v square- u square = 2as

if u = 0

v square- 0 square = 2as

v square = 2as

s = v square by 2a

put value of s in w

w= ma × v square by 2a

w = 1by 2 MV square

this work done is stored in the form of kinetic energy

kinetic energy = 1/2mv^2

Answer 2

Answer:

1/2=mv^2

Explanation:

energy formula is E=F×S

kinetic energy =F×S

formula=v^2=U^2+2as

here u^2 =0

Reason : because an object posses kinetic when it is in motion but when object is in rest so it posses potential energy.

V^2=2as

S=V^2/2a

enregy =f×s (s=v^2/2a)

but F=m×a =V^2/2a

m×a=V^2/2a [a (acceleration) is

common so cutting a

from both the sides.]

so formula is 1/2×mv^2.

hope this may help you .

please mark me as brainlist because I am new commer in is application.

thank you.