Welcome to your work , Energy & power - 2
1.
If vectors are parallel, A·B is
2.
Dot product of perpendicular vectors is
3.
Dot product helps find
4.
If A ⟂ B, then projection of A on B is
5.
Dot product is commutative because
6.
Which force does zero work in circular motion?
10.
Projection of A on B equals
12.
If A·B = 0, vectors are
14.
Work done by friction is usually
15.
Which law dot product does NOT follow?
16.
Work done can be negative means
17.
Dot product of vector with itself is always
18.
Work done is independent of
19.
Which quantity is defined using scalar product?
20.
If force makes obtuse angle with displacement, work is
23.
Work done by centripetal force is
25.
Dot product of unit vectors i·j equals
26.
Negative work is done when force is
27.
If A = 3i + 4j, magnitude of A·A is
29.
Which law dot product does NOT follow?
30.
If force acts opposite to displacement, work is
31.
Work done is zero when force is
32.
Angle between vectors if A·B = AB
33.
Work done by force F is maximum when θ is
34.
If θ = 90°, A·B equals
35.
Scalar product of two vectors A and B is
37.
If displacement is zero, work done is
38.
If A·B = 0, then A and B are
39.
Scalar product depends on
40.
If vectors are antiparallel, A·B is
41.
Angle between vectors if A·B = –AB
42.
Which quantity uses dot product?
43.
Dot product result is
44.
Work done by force F is maximum when θ is
45.
Unit of scalar product of force and displacement is
