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Chapter 2 - Vectors and Equilibrium - 2
1.
If r = 5m and f = 4N are along same direction then torque is:-
a) 20N-m
b) 5N-m
c) 10Nm
d) Zero
2.
A body is in a static equilibrium only when it is:-
a) at rest
b) moving with uniform velocity
c) moving with variable velocity
d) moving with uniform acceleration
3.
Two lines ________________ to each other are known as co-ordinate axes.
a) At right angle
b) At obtuse angle
c) At acute angle
4.
The sum of a vector and its negative vector is a ____________ vector.
a) Null
b) Base
c) Basic
5.
If A and B are parallel to each other then their resultant is _________
a) A / B
b) A x B
c) A + B
6.
When a vector is multiplied by -1, the direction changes by _________
a) 90
o
b) 180
o
c) 270
o
7.
The signs of x and y components of resultant vector determine the ___________ in which the resultant vector lies.
a) Quadrant
b) Partial
c) Sector
8.
If the dot product of two non-zero vectors A and B is zero then their cross product is _________
a) AC
b) AD
c) AB
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