Two particles of masses m1, m2 move with initial velocities u1 and u2. On collision, one of the particles get excited to higher level, after absorbing energy $$\varepsilon $$. If final velocities of particles be v1 and v2 then we must have :
Two spherical bodies of mass M and 5M and radii R and 2R are released in free space with initial separation between their centres equal to 12R. If they attract each other due to gravitational force only, then the distance covered by the smaller body before collision is :
A
7.5R
B
1.5R
C
2.5R
D
4.5R
3
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three pieces. Two pieces, each of mass (m) move perpendicular to each other with equal speeds (v). The total kinetic energy generated due to explosion is :
A
mv2
B
$${3 \over 2}$$mv2
C
2mv2
D
4mv2
4
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
The force F acting on a particle of mass m is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is :
