Question

two object having equal mass are moving with uniform velocity of 2 metre per second and 6 metre per second respectively calculating the ratio of their kinetic energy​

Answer 1

Answer:

Ratio = 1:9

Explanation:

Let mass of both object be x kg

Velocity of 1st object = 2m/s

Velocity of 2nd object = 6m/s

Kinetic Energy = $1/2 mv^{2}$

Ratio of their Kinetic Energy =

⇒$1/2 mv^{2}$ / $1/2 mV^{2}$

⇒$v^{2}$ / $V^{2}$

⇒ $2^{2} / 6^{2}$

⇒ 4 / 36

⇒1 / 9

Ratio = 1:9

Answer 2

Answer:

let the mass be = m

velocity (1) = 2m/s

velocity (2) = 6m/s

we know , KE = 1/2 × mv²

KE(1) = 1/2 × 2²×m

= 4m/2 = 2m J

KE(2) = 1/2 × 36 × m

= 18m J

ratio of KV(1) to KV(3) is = 2mJ/18mJ

= 1:9

hope it helped ;)