A body constrained to move in Y-direction is subjected to a force given by . What is the work done by this force in moving the body through a distance of 10 m along Y-axis?
190 J
160 J
150 J
20 J
The magnitudes of vectors are 3,4 and 5 units respectively. If , the angle between is
cos-1 (0.6)
A bullet is fired from a gun with a speed of 100 m/s in order to hit a target 100m away. At what height above the target should the gun be aimed? (The resistance of air is negligible and g = 10 m/s2)
5 cm
10 cm
15 cm
20 cm
P is the point of contact of a wheel and the ground. The radius of wheel is 1 m. The wheel rolls on the ground without slipping. The displacement of point P when wheel completes half rotation is
2 m
π m
Which of the following is not a vector quantity?
Speed
Velocity
Torque
Displacement
The speed of a boat is 5km/h in still water. It crosses a river of width 1.0 km along the shortest possible path in 15min. The velocity of the river water is (in km/h)
5
1
3
4
The vectors and are such that | + | = | - | then angle between the two vectors will be
45°
60°
75°
90°
If a vector is perpendicular to the vector , then the value of α is
-1
If a unit vector is represented by , then the value of c is
√0.11
√0.01
0.39
The resultant of × 0 will be equal to
zero
A
zero vector
unit vector
