Engineering Mechanics - Data Intensity 4 | Multiple Questions and Answers

1.	What is the dot product of two vectors which are having a magnitude equal to unity and are making an angle of 45�?

	A.	0.707
	B.	-0.707
	C.	1.414
	D.	-1.414

2.	Mathematically, for two vectors A and B of any magnitude, the cross product of both, i.e. AxB = given by:

	A.	\|A\|\|B\|sin�
	B.	\|A\|\|B\|
	C.	\|A\|\|B\|cos�
	D.	\|A\|\|B\|sin(180�+�)

3.	Which among the following is the distributive law for the cross product of three vectors?

	A.	Px(Q+S) = (PxQ) + (PxS)
	B.	Px(QxS) = (PxQ) + (PxS)
	C.	Px(QxS) = (PxQ) x (PxS)
	D.	Px(Q+S) = (PxQ) + (QxS)

4.	Which statement is true? (For three vectors P, Q and R)

	A.	Associative law for cross product: (PxQ)xS = Px(QxS)
	B.	Associative law for cross product: (PxQ)xS ? Px(QxS)
	C.	Associative law for cross product: (PxQ)xS > Px(QxS)
	D.	Associative law for cross product: (PxQ)xS < Px(QxS)