A body of mass 1 𝑘𝑔 is thrown upwards with a velocity 20 𝑚/𝑠. It momentarily comes to rest after attaining a height of 18 𝑚. How much energy is lost due to air friction (𝑔 = 10 𝑚/𝑠 2 )

May 11, 2022

by Ezee_Notes

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Physics Problems

Question: A body of mass 1 𝑘𝑔 is thrown upwards with a velocity 20 𝑚/𝑠. It momentarily comes to rest after attaining a height of 18 𝑚. How much energy is lost due to air friction (𝑔 = 10 𝑚/𝑠 2 )

(A) 20 𝐽

(B) 30 𝐽

(D) 10 𝐽

Answer: Option (A)

Solution:

A body of mass 1 𝑘𝑔 is thrown upwards with a velocity 20 𝑚/𝑠. It momentarily comes to rest after attaining a height of 18 𝑚. How much energy is lost due to air friction (𝑔 = 10 𝑚/𝑠 2 )