   Chapter 6, Problem 14CQ

Chapter
Section
Textbook Problem

An open box slides with constant speed across the frictionless surface of a frozen lake. If water from a rain shower fails vertically downward into it, does the box: (a) speed up, (b) slow down, or (c) continue to move with constant speed?

To determine
The velocity of the box.

Explanation

Give Info:

An open box slides with constant speed across the frictionless surface. Water from rain shower falls vertically downward into the box.

To know the Velocity of box when water falls into it, can be found using the concept of momentum.

Momentum: The linear momentum p of an object of mass m moving with velocity v is the product of the mass and velocity.

P=mv

• P is the momentum on the object
• m is the mass of the object.
• v is the velocity of the object

Momentum is a vector quantity with the same direction as the object’s velocity

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