Welcome to your work , Energy & power - 2
1.
If A = 3i + 4j, magnitude of A·A is
2.
If θ = 90°, A·B equals
3.
Dot product of vector with itself is always
4.
Dot product of unit vectors i·j equals
7.
Work done is independent of
8.
Which force does zero work in circular motion?
10.
If vectors are parallel, A·B is
11.
Scalar product of two vectors A and B is
13.
Dot product of perpendicular vectors is
15.
Which quantity uses dot product?
16.
If A ⟂ B, then projection of A on B is
17.
If A·B = 0, then A and B are
19.
Work done by friction is usually
20.
If vectors are antiparallel, A·B is
21.
If A·B = 0, vectors are
23.
Scalar product depends on
24.
Which quantity is defined using scalar product?
25.
Negative work is done when force is
27.
Which law dot product does NOT follow?
28.
If force makes obtuse angle with displacement, work is
29.
Work done can be negative means
30.
Work done is zero when force is
31.
Unit of scalar product of force and displacement is
33.
Angle between vectors if A·B = –AB
34.
Which law dot product does NOT follow?
36.
Angle between vectors if A·B = AB
37.
Projection of A on B equals
38.
Work done by centripetal force is
39.
Dot product helps find
40.
Work done by force F is maximum when θ is
41.
Dot product is commutative because
42.
Work done by force F is maximum when θ is
43.
If displacement is zero, work done is
45.
If force acts opposite to displacement, work is
