Question

In: Physics

A 712 N student stands in the middle of a frozen pond having a radius of...

A 712 N student stands in the middle of a frozen pond having a radius of 5.9 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 2.2 kg physics textbook horizontally towards the north shore at a speed of 6.0 m/s. How long does it take him to reach the south shore?

Solutions

Expert Solution

Given the weight of the student,

Mass of the student,

===============

First, find the velocity of the student after he/she throws the physics textbook.

While throwing the book, momentum is conserved

Initial momentum = Final momentum

The negative sign just indicates that the student will move in the opposite direction with respect to the direction in which the book was thrown.

So the speed of student,

Since there is no friction, the student will move with constant velocity.

Speed = Distance/Time

Time = Distance/Speed

Distance to cover is equal to the radius of the pond.

ANSWER:

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genius_generous answered 1 week ago

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