Question Text
Question 1 :
A particle is taken round a circle by application of force. The work done by the force is
Question 2 :
If the momentum of a body is increased by <b>50%</b> then the percentage increase in its kinetic energy is
Question 3 :
An athlete in the olympic games covers a distance of {tex} 100 \mathrm { m } {/tex} in {tex} 10 \mathrm { s } {/tex}. His kinetic energy can be estimated to be in the range
Question 4 :
A block of mass {tex} 0.50 \mathrm { kg } {/tex} is moving with a speed of {tex} 2.00\ \mathrm { ms } ^ { - 1 } {/tex} on a smooth surface. It strikes another mass of {tex} 1.00 \ \mathrm { kg } {/tex} and then they move together as a single body. The energy loss during the collision is
Question 5 :
A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?
Question 6 :
If two like charged particles are brought near one another, the potential energy of the system will
Question 7 :
When a body is projected vertically up from the ground with certain velocity, its potential energy and kinetic energy at a point A are in the ratio {tex} 2: 3 . {/tex} If the same body is projected with double the previous velocity, then at the same point A the ratio of its potential energy to kinetic energy is
Question 8 :
If a machine gun fires n bullets per second each with kinetic energy {tex} \mathrm { K } , {/tex} then the power of the machine gun is
Question 9 :
The work done in sliding a wooden box of mass $5\ kg$ along a friction less inclined plane of inclination ${30}^{o}$ and length $10\ m$ is______$J$. $(g=10\ {ms}^{-2})$
Question 10 :
A car of mass {tex} m {/tex} starts from rest and accelerates so that the instantaneous power delivered to the car has a constant magnitude {tex} p _ { 0 } {/tex}. The instantaneous velocity of this car is proportiourl to: