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
Which of the following cannot be the resultant of the vectors of magnitudes 5 and 10?
7
8
5
2
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
are two vectors and θ is the angle between them, if the value of θ is
60o
45o
30o
90o
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
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
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
0o
180o
None
If a vector is perpendicular to the vector , then the value of α is
-1
1/2
-1/2
1
The force acting on a body of 10 kg is N. If the body is initially at rest, then velocity at the end of 20 sec will be (in m/s).
2√6
6√2
3√2
2√3
