A particle of mass 1 kg is located at (0,0) and a particle of mass 2 kg is located at (3,0). What is the location of the center of mass of this system?
(0,0)
(1,0)
(1.5,0)
(2,0)
The net external force on a system of particles is zero. What is the velocity of the center of mass of the system?
0
Constant
Constantly increasing
Constantly decreasing
The net external force on a system of particles is zero. What is the velocity of each particle in the system?
Not enough information
Four particles of equal mass are at points (0,0), (2,0), (2,2) and (0,2). Where is the center of mass of the system?
(1,1)
(2,2)
Where is the center of mass of a single particle?
The point halfway between the particle and the origin
The origin
The position of the particle
Undefined
A net force of 8 N is applied to a system containing four masses, each of 1kg. What is the resultant acceleration of the center of mass of the system?
2 m/s
8 m/s
12 m/s
32 m/s
What is the definition of impulse?
Force per unit time
Force per unit distance
Force over a distance
Force over a time
A bat exerts a force on a ball of 100 N for a period of .1 seconds. What is the impulse provided by the bat?
100
10
1
1000
A net impulse on an object causes
A change in its kinetic energy
A change in its speed
A change in its momentum
A change in its mass
A ball of mass 2 kg bounces against a wall with a velocity of 6 m/s and rebounds with the same velocity. What is the impulse provided by the wall?
12
24
3
8
What are the units of impulse, in terms of fundamental units?
N-s
kg-m/s
J/s
kg-m
