Work,Power and Energy Quiz-01

1. If a machine is lubricated with oil

 
 
 
 

2. Two masses of 1 g and 4 g are moving with equal kinetic energies. The ratio of the magnitudes of their momenta is

 
 
 
 

3. An ideal spring with spring constant k is hung from the ceiling and a block of mass M is attached to its lower end. The mass is released with the spring initially unstretched. Then the maximum extension in the spring is

 
 
 
 

4. A uniform chain of length L and mass M is lying on a smooth table and one-third of its length is hanging vertically down over the edge of the table. If g is acceleration due to gravity , the Work required to pull the hanging part on to the table is

 
 
 
 

5. A time independent force F=6t acts on a particle of mass 1 kg. If the particle starts from rest, the work done by the force during the first 1s will be

 
 
 
 

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