The angle between is θ. The value of the triple product is
A2B
Zero
A2B sin θ
A2B cos θ
A person walks up a stationary escalator in time t1. If the person remains stationary on the escalator, then it can take him up in time t2. The time that would it take him to walk up the moving escalator is
t1 - t2
t2 - t1
0o
90o
180o
None
A rod of length PQ = l leans by its upper end against a smooth vertical wall while its end leans against the base. The end Q of the rod moves uniformly downward with speed v1. The end P will move on the floor with velocity v2 such that :
v2 is uniform and v2 = v1
v2 is uniform but v2 ≠ v1
v2 continuously increases
v2 continuously decreases
are two vectors and θ is the angle between them, if the value of θ is
60o
45o
30o
120o
Given that and makes angle α and β with and respectively, then which of the following is correct
α cannot be less than β
α < β if P < Q
α < β if P > Q
α < β if P = Q
Two quantities A and B have different dimensions. Which mathematical operation given below is physically meaningful?
A/B
A + B
A - B
The vectors satisfy then,
is perpendicular to both and
and are essential products
is parallel to both and
