Question 1

Identical forces act for the same length of time on two different masses. The change in momentum of the smaller mass is

Accepted Answer

A) smaller than the change in momentum of the larger mass, but not zero. 
B) larger than the change in momentum of the larger mass. 
C) equal to the change in momentum of the larger mass. 
D) zero. 
E) There is not enough information to answer the question. 
A) smaller than the change in momentum of the larger mass, but not zero. 
B) larger than the change in momentum of the larger mass. 
C) equal to the change in momentum of the larger mass. 
D) zero. 
E) There is not enough information to answer the question.

Question 2

Three masses are located in the x-y plane as follows: a mass of 6 kg is located at (0 m, 0 m), a mass of 4 kg is located at (3 m, 0 m), and a mass of 2 kg is located at (0 m, 3 m). Where is the center of mass of the system?

Accepted Answer

A) (1 m, 2 m) 
B) (2 m, 1 m) 
C) (1 m, 1 m) 
D) (1 m, 0.5 m) 
E) (0.5 m, 1 m) 
A) (1 m, 2 m) 
B) (2 m, 1 m) 
C) (1 m, 1 m) 
D) (1 m, 0.5 m) 
E) (0.5 m, 1 m)

Question 3

A 2.00-m rod of negligible mass connects two small objects. The mass of one object is 1.00 kg and the other is 1.50 kg. How far is the center of mass of this system from the 1.00 kg mass?

Accepted Answer

A) 0.800 m 
B) 0.670 m 
C) 1.25 m 
D) 1.33 m 
E) 1.20 m 
A) 0.800 m 
B) 0.670 m 
C) 1.25 m 
D) 1.33 m 
E) 1.20 m

Question 4

A 2.00-kg mass is located at (4.00 m)   +(-1.00 m)   . A 1.00-kg mass is located at (1.00 m)   + (2.00 m)   . Where must a 3.00-kg mass be located so that the center of mass of the system is located at (-1.00 m)   + (1.00 m)   ?

Accepted Answer

A) (-4.00 m)   + (-0.600 m)   
B) (-8.00 m)   + (3.20 m)   
C) (-2.00 m)   + (2.00 m)   
D) (-5.00 m)   + (2.00 m)   
E) (-15.0 m)   + (6.00 m)   
A) (-4.00 m)   + (-0.600 m)   
B) (-8.00 m)   + (3.20 m)   
C) (-2.00 m)   + (2.00 m)   
D) (-5.00 m)   + (2.00 m)   
E) (-15.0 m)   + (6.00 m)

Question 5

The center of mass of a continuous, uniform object is located at the geometric center of the object.

Accepted Answer

A) True 
 B)False

Exam 9: Linear Momentum

Identical forces act for the same length of time on two different masses. The change in momentum of the smaller mass is

Three masses are located in the x-y plane as follows: a mass of 6 kg is located at (0 m, 0 m), a mass of 4 kg is located at (3 m, 0 m), and a mass of 2 kg is located at (0 m, 3 m). Where is the center of mass of the system?

A 2.00-m rod of negligible mass connects two small objects. The mass of one object is 1.00 kg and the other is 1.50 kg. How far is the center of mass of this system from the 1.00 kg mass?

A 2.00-kg mass is located at (4.00 m) +(-1.00 m) . A 1.00-kg mass is located at (1.00 m) + (2.00 m) . Where must a 3.00-kg mass be located so that the center of mass of the system is located at (-1.00 m) + (1.00 m) ?

The center of mass of a continuous, uniform object is located at the geometric center of the object.

Introduction, Measurement, Estimating

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