Question

Of masses 4kg and 9 kg are lifted to the same height of the ground then the ratio of their potential energies are

Answer 1

Answer:

4 : 9

Explanation:

Given:

Mass of the first body 1 (m₁) = 4 kg

Mass of the second body 2 (m₂)  = 9 kg

Acceleration due to gravity (g)

Since the height of the 2 bodies is same, we can take it as a constant (h).

To find:

P.E  (Potential Energy)

Method to find:

P.E = mgh

P.E of the first body:

mgh

⇒ m₁gh

P.E of the second body:

mgh

⇒ m₂gh

Ratio of their potential energies:

m₁gh : m₂gh

⇒ m₁gh/gh : m₂gh/gh   (cancelling out the same constants)

⇒ m₁ : m₂

⇒ 4 :9

Hence, the ratio of their potential energies is 4:9.

Answer 2

Answer:

4:9

Explanation:

M1 = 4Kg

M2 = 9Kg

•

• • PE1/PE2=M1/M2=4/9

PE1:PE2=4:9