A735 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?

weight W = 735 N

From W = Mg

mass M = W/g = 735/9.81

M = 74.91 Kg

He needs to cover the distance equal to the radius so d= 5 m

He throw m = 1.2 kg mass

speed of book v= 5.0 m/s

we can use momentum conservation to find out the speed of person

Initially total momentum was zero as both were at rest

0 = mv + MV

0 = (1.2x5) + (74.91)V

V = - 0.08 m/s

negative sign just shows the direction of velocity

time taken to cover 5 m distance

d = v*t

t = d/v

t = 5/0.08

t =  62 sec

false

explanation:

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