   Chapter 6, Problem 7P

Chapter
Section
Textbook Problem

An object has a kinetic energy of 275 J and a momentum of magnitude 25.0 kg · m/s. Find the (a) speed and (b) mass of the object

(a)

To determine
The velocity of the object.

Explanation

Given Info: The kinetic energy of an object is 275J and the momentum of the object is 25.0kgm/s .

The expression for Kinetic energyof the object is,

K.E=12mv2                                                                 (I)

• m is the mass of an object,
• v is the velocity of the object,
• K.E is the kinetic energy,

The momentum of the object is,

p=mv                                                                          (II)

• p is the momentum

Divide the equation (i) by equation (ii) and rewrite in terms of v

(b)

To determine
The mass of the object.

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