Question

A 730-N man stands in the middle of a frozen pond of radius 5.0 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 1.2-kg physics textbook horizontally toward the north shore at a speed of 5.0 m/s. How long does it take him to reach the south shore?

Answer 1

Answer:62.11 s

Step-by-step explanation:

Given

weight of man =730 N

mass of man
`m_1=(730)/(9.8)=74.48 kg`

radius of pound r=5 m

mass of book
`m_2=1.2 kg`

velocity of book
`v_2=5 m/s`

let
`v_1` be the velocity of man

conserving momentum

`0=m_1v_1+m_2v_2`

`0=74.48* v_1+1.2* 5`

`v_1=(6)/(74.48)=0.0805 m/s`

time taken by man to reach south end

`t=(5)/(0.0805)=62.11 s`