Vectors and Equilibrium — Physics MCQs (Class 11)
Free chapter-wise Physics MCQs with answers for MDCAT, FSc and entry tests.
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#129 The scalar product of two vectors is a:
A) Scalar
B) Vector
C) Unit vector
D) Tensor
#130 The vector product of two vectors is a:
A) Scalar
B) Vector
C) Unit vector
D) Null vector
#131 The formula for work done by a constant force is:
A) $W = \vec{F} \times \vec{d}$
B) $W = \vec{F} \cdot \vec{d}$
C) $W = Fd\sin\theta$
D) $W = Fd$
#132 A body is in equilibrium if the sum of all forces and torques acting on it is:
A) Maximum
B) Minimum
C) Zero
D) Constant
#133 What is the magnitude of the force required to produce a torque of 20 Nm at a distance of 4 m?
A) 5 N
B) 80 N
C) 4 N
D) 20 N
#134 What is the SI unit of power?
A) Joule
B) Watt
C) Newton
D) Pascal
#135 The concept of center of gravity is most relevant for a body under the influence of:
A) A single force
B) Multiple forces
C) A uniform gravitational field
D) No forces
#136 The direction of a vector is given by:
A) A number
B) An angle
C) A unit vector
D) Both B and C
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