11 Questions
If two forces exert equal non-zero torques, what can be said about the torques?
They are in opposite directions
In the scenario of two forces applied perpendicularly to a doorknob, if the first force is twice as large as the second force, what is the torque ratio?
2
In problem-solving with a uniform seesaw, if Child A has a mass of 60 kg and sits 2.0 m from the center, and Child B has a mass of 40 kg, what is the condition for balancing the seesaw?
Child B must sit 3.0 m from the center
When a 10.0-m uniform beam of weight 100 N is supported by two ropes at the ends, and a 400-N person sits at 2.00 m from the left end of the beam, what is the tension in the left rope?
370 N
If two children sit on opposite ends of a seesaw with masses of 60 kg and 40 kg respectively, how does their distance from the center affect balancing?
The heavier child must sit closer to the center
Which statement about the center of mass of an object is FALSE?
For an object on Earth, the center of gravity and center of mass are always the same point.
A 4.00-kg mass is located at the origin, and a 10.0-kg mass is located at x = +21.0 m. Where is the center of mass on the x-axis?
+14.0 m
In a two-particle system with the center of mass at the origin, one particle has a mass of 2.0 kg and is located at (3.0 m, 0). What is the location of the second particle with a mass of 3.0 kg?
(-3.0 m, 0)
Two equal forces are applied to a door, one at the midpoint and one at the doorknob, both perpendicular to the door. Which force exerts the greater torque?
the force at the doorknob
Two equal forces are applied to a door at the doorknob, one perpendicular to the door and one at 30 degrees to the plane of the door. Which force exerts the greater torque?
the force applied perpendicular to the door
What is the relationship between the center of mass and center of gravity for an object on the surface of the Earth?
They are always the same point.
Test your knowledge on center of mass and center of gravity concepts with this multiple choice quiz. Questions cover statements about the center of mass and center of gravity of objects, including those on Earth's surface.
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