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Chapter 1: Q57P (page 42)

What is the velocity of a 3 kg object when its momentum is 20,50,-10m/s?

Short Answer

Expert verified

Answer:

The velocity of given object is 20,50,-10m/s.

Step by step solution

01

Definition of momentum

Momentum is the product of the mass, m of a particle and its velocity v, p = mv . Momentum is a vector quantity that is, it has both magnitude and direction.

From the formula of momentum it is concluded that, v鈫�=p鈫�m.

02

Finding velocity

It is given that object has 3kg mass and momentum is60,150,-30kg.m/s .

Substitute and into m = 3 and p鈫�=60,150,-30intov鈫�=p鈫�m to get the velocity vector.

v鈫�=60,150,-303=20,50,-10m/s

Therefore, the velocity of the given object is =20,50,-10m/s.

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Most popular questions from this chapter

Write the vector a=鈬赌400,100,-100m/s2as the product a鈬赌.a.鈬赌

Question: What is the magnitude of the vector v, where v=(8脳106,0,-2脳107)m/s?

Figure 1.55 shows several arrows representing vectors in the xy plane. (a) Which vectors have magnitudes equal to the magnitude of a鈬赌? (b) Which vectors are equal to a鈬赌?

A proton is located at <3脳10-10,-3脳10-10,8脳10-10>m.

(a)What is r鈫�, the vector from the origin to the location of the proton?

(b)What is |r鈫�|?

(c)What is r^, the unit vector in the direction of r鈫�?

Consider the vectors r1鈫�and r2鈫�represented by arrows in Figure 1.20. Are these two vectors equal? (b) If a鈫�=<400,200-100>m/s2,and c鈫�=a鈫�, what is the unit vector c^in the direction of c^?

Figure 1.20
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