When milk is churned, cream gets separated due to
centripetal force
centrifugal force
frictional force
gravitational force
A bus is moving on a straight road towards north with a uniform speed of 50 km/h. If the speed remains unchanged after turning through 90°, the increase in the velocity of bus in the turning process is
7.07 km/h along south-west direction
zero
50 km/h along west
70.7 km/h along north-west direction
The magnitudes of vectors are 3,4 and 5 units respectively. If , the angle between is
cos-1 (0.6)
The angle between and is θ. The value of the triple product .( × ) is
A2B
A2B sin θ
A2B cos θ
What is the linear velocity if angular velocity vector and position vector ?
The resultant of × 0 will be equal to
A
zero vector
unit vector
A body is whirled in a horizontal circle of radius 20 cm. It has an angular velocity of 10 rad/s. What is its linear velocity at any point on circular path?
√2 m/s
2 m/s
10 m/s
20 m/s
Two bodies of same mass are projected with the same velocity at an angle 30° and 60° respectively. The ratio of their horizontal ranges will be
1 : 1
1 : 2
1 : 3
1 : √2
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 maximum range of a gun of horizontal terrain is 16 km. If g = 10 ms-2 , then muzzle velocity of a shell must be
160 ms-1
200√2 ms-1
400 ms-1
800 ms-1