ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge

Question 136

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What does the scalar triple product a·(b×c) represent in magnitude?

Area of triangle
Sum of vectors
Volume of sphere
Volume of the parallelepiped

Question 137

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What is the area of the triangle formed by two vectors a and b?

|a × b|
(1/2)|a × b|
|a · b|
|a + b|

Question 138

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What determines the velocity of the center of mass of a system of particles?

Average of individual velocities
Sum of velocities
Total momentum divided by total mass
Net force acting

Question 139

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A child is sitting at one end of a trolley moving uniformly with speed V on a smooth floor. If the child runs about inside the trolley, what happens to the speed of the center of mass of the system?

Becomes zero
Increases
Decreases
It remains V

Question 140

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Where is the center of mass of a uniform cube located?

At a corner
At the center of a face
At the midpoint of an edge
At the intersection of its diagonals

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