Two balls of mass 1 kg and 2 kg respectively are connected to the two ends of the spring. The two balls are pressed together and placed on a smooth table. When released the lighter ball moves with acceleration of 2 ms-2. The acceleration of the heavier ball will be
4 ms-2
2 ms-2
1 ms-2
0.5 ms-2
Two forces of 6N and 8N act on a body of mass 7kg. The maximum value of acceleration produced cannot be more than
2ms-1
4ms-1
6ms-1
8ms-1
A body of mass 0.1 kg attains a velocity of 10 m/s in 0.1s.The force acting on them is:
10 N
0.001 N
0.01 N
1000 N
A passenger in the bus finds that his suit case suddenly starts sliding backwards. This means that the bus is
turning left
turning right
accelerating
retarding
To avoid slipping while walking on ice one should take smallest steps because of the
larger friction
larger normal reaction
smaller friction
smaller normal reaction
A body of mass 2 kg ,moving on a horizontal surface with an initial velocity of 4 m/s , comes to rest after 2 s.If one wants to keep this moving on the same surface with a velocity of 4 m/s,the force required is
2 N
4 N
6 N
A light string passing over a smooth light pulley , connects two blocks of masses m1 and m2 (vertically).If the acceleration of the system is (g/8),then the ratio of masses is
8 : 1
9 : 7
4 : 3
5 : 3
A smooth inclined plane has length 10 m and the angle of inclination is 300. A body of mass 2 kg is released from rest at the top of the inclined plane. What is its acceleration down the inclined plane?
10 ms-2
5√3 ms-2
5 ms-2
20/√3 ms-2
A body is at rest on the surface of the earth. Which of the following statement is correct?
No free is acting on the body
Only weight of the body acts on it.
Net downward force is equal to the net upward force.
None of the above statement is correct
Two trains A and B are running in the same direction on parallel tracks such that A is faster than B.If packets of equal weight are exchanged between the two, then
A will be retarded but B will be accelerated
A will be accelerated but B will be retarded
there will not be any change in the velocity of A but B will be accelerated.
there will not be any change in the velocity of B,but A will be accelerated.