Two particle A and B are connected by a rigid rod AB .The rod slides along perpenticular rails as shown here.The velocity of A to the rigid is 10 m /s .What is the velocity of B when angle a = 600?
9.8 m/s
10 m /s
5.8 m /s
17.3 m /s
The vector sum of two forces is perpenticular to their vector differences,In that case,the forces
are not equal to each other in magnitude
cannot be predicted
are equal to each other
are equal to each other in magnitude
A particle of mass m is projected with velocity v making an angle of 450 with the horizontal.When the particle lands on the level ground the magnitude of the change in its momentum will be
2 mv
mv / √2
mv √2
zero
00
450
900
1800
A2B
Zero
A2B sinθ
A2B cosθ
Two bodies of same mass are projected with the same velocity at an angle 300 and 600 respectively. The ratio of their horizontal ranges will be
1:1
1:2
1:3
2:√2
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
A
B
C
D
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 900,the increase in the velocity of bus in the turning process is
70.7 km/h along south - west direction.
50 km/h along west
70.7 km/h along north- west direction
A stone is tied to a string of length l and is whirled in a vertical circle with the other end of the string as the centre.At a certain instant of time,the stone is at its lowest position and has a speed u.The magnitude of the change in velocity as it reaches a position where the string is horizontal (g being acceleration due to gravity) is
A+B
(A2+B2+√3 AB)1/2
