The center of mass of a two-particle system is at the origin. One particle is located at (3.0 m, 0.0 m) and has a mass of 2.0 kg. The other particle has a mass of 3.0 kg. What is the location of the 3.0-kg particle?
A) (-3.0 m, 0.0 m)
B) (-2.0 m, 0.0 m)
C) (2.0 m, 0.0 m)
D) (3.0 m, 0.0 m)
B
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Two people sit face to face on nice skateboards that are free to roll without friction. They push each other with a force of 40 N and move apart. Person X, whose mass (including the skateboard) is 50 kg, moves to the left at 3 m/s. Person Z, whose mass (including the skateboard) is 60 kg,
A. moves to the right at 1 m/s. B. moves to the right at 10 m/s. C. moves to the right at 2.5 m/s. D. moves to the right at 4 m/s.
Particles made up of two quarks must consist of a quark-antiquark pair
Indicate whether the statement is true or false
An object is attached to a vertical spring and bobs up and down between points A and B. Where is the object located when its kinetic energy is a maximum?
A) at either A or B B) midway between A and B C) one-third of the way between A and B D) one-fourth of the way between A and B E) at none of the above points
The rate of doing work, or of transforming energy, can be measured in
A) joules. B) newtons. C) kilowatt-hours. D) Calories. E) watts.