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Class XII Maths Vector Algebra Quiz 4
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Question 1
A girl walks 4 km towards West, then she walks 3 km in a direction 300 East of North and stops. Then, the girl’s displacement from her initial point of departures is
Question 2
The values of and for which the vectors is perpendicular to the vector b=
Question 3
Three forces of magnitudes 1, 2 and 3 dynes meet in a point and act along diagonals of three adjacent faces of a cube. The resultant force is
Question 4
If are the position vectors of the vertices of an equilateral triangle whose orthocentre is at the origin, then
Question 5
The angle between two active forces P + Q and P – Q is 2α. If their resultant make angle θwith bisector of angle. Then
Question 6
At a point the addition of two active force is 18 N. If the magnitude of resultant is 12 N and meet at right angle. Then, magnitude of forces are
Question 7
In a parallelogram ABCD,
and
, then
has the value:
and
, then
has the value:
Question 8
Let u, v and w be such that |u|=1, |v|=3 and |w|=2. If the projection of v along u is equal to that of w along u and vectors v and w are perpendicular to each other, then|u-v+w|equals
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Mar 8JEE & BITSAT