Physics
Vectors and Equilibrium
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#65 The value of $\hat{k} \times \hat{j}$ is:
A) 0
B) 1
C) $\hat{i}$
D) $-\hat{i}$
#66 If $\vec{A} \cdot \vec{B} = AB$, then the angle between $\vec{A}$ and $\vec{B}$ is:
A) $0^\circ$
B) $45^\circ$
C) $90^\circ$
D) $180^\circ$
#67 A uniform rod is in equilibrium. The sum of clockwise torques about any point is equal to:
A) The sum of anticlockwise torques
B) Zero
C) The applied force
D) The net force
#68 The concept of center of gravity is closely related to the concept of:
A) Center of mass
B) Centroid
C) Center of rotation
D) Point of application
#69 A quantity that has magnitude but no direction is called a:
A) Vector
B) Scalar
C) Tensor
D) Null vector
#70 The vector product is also known as:
A) Scalar product
B) Cross product
C) Dot product
D) Component product
#71 The scalar product is also known as:
A) Cross product
B) Dot product
C) Vector product
D) Null product
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