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
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
The vectors satisfy then,
is perpendicular to both and
and are essential products
is parallel to both and
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
Two equal vectors have a resultant equal to either of them. The angle between them is
60o
90o
100o
120o
Rain is falling vertically with a speed of 30 ms-1. A man rides a bicycle with a speed of 10 ms-1 in north to south direction. The angle with the vertical at which the man should hold his umbrella to protect himself from the rain is:
None of these
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
3
4
9
13
