Two quantities A and B have different dimensions. Which mathematical operation given below is physically meaningful?
A/B
A + B
A - B
None
The angle between two vectors of magnitude 12 and 18 units when their reultant is 24 units is
63.50o
75.52o
82.30o
89.16o
The angle between two vectors will be
Zero
45o
90o
180o
0
π/2
π/4
π
The sum of two forces at a point is 16N. If their resultant is normal to the smaller force and has a magnitude of 8N, then the forces are
8N and 8N
6N and 10N
4N and 12N
2N and 14N
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
A force N acting on a mass produce an acceleration of 1m/s2. What will be the mass of the body?
10√2 kg
2√10 kg
10 kg
20 kg
The angle between the two vectors will be
0o
The vectors are such that then angle between the two vectors will be
60o
75o
A boat is sent across a river with a velocity of 8 km/h. If the resultant velocity of boat is 10 km/h, then velocity of river is
12.8 km/h
6 km/h
8 km/h
10 km/h
