When milk is churned ,cream gets separated due to
centripetal force
centrifugal force
frictional force
gravitational force
190J
160J
150J
20J
directed towards the origin
directed away from the origin
parallel to the position vector
perpenticular to the position vector
zero
A
zero vector
unit vector
A bullet is fired a gun with a speed of 1000 m/s in order to hit a target 100 m 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
cos-1 (0.6)
When a body moves with a constant speed along a circle
Its velocity remains constant
No force act on it
No work is done on it
No acceleration is produced in it
A2B
Zero
A2B sinθ
A2B cosθ
A stone is attached to one end of a string and rotated in a vertical circle .If string breaks at the position of maximum tension .It will break at
B
C
D
