Question 2 :
In which one of the following cases is work done the maximum ?
Question 3 :
An object of mass 10 kg is at a point A on a table. It is moved to a point B by a distance 5 m. If the line joining A and B is horizontal, then what is the work done on the object by gravitational force ?
Question 4 :
A particle of mass $1kg$ starts from rest under a time dependent force $F = 1+2t$. The work done by the force in time interval $t =0$ to $ t= 2s$ is 
Question 6 :
A force $F$ acts on a body and displaces it by a distance $S$ in a direction at an angle $\theta$ with the direction of force. What should be the angle between the force and displacement to get zero work?
Question 7 :
A ball hits the floor and rebounds after inelastic collision. In this case
Question 8 :
Assertion: Kilowatt Hour is the unit of electric power
Reason: KWH is a commercial unit used for expressing consumed electrical energy.
Question 9 :
If a shell fired from a cannon ,explodes in mid air, then
Question 10 :
A motor of 100 H.P. moves a load with a uniform speed of 72 km/hr. The forward thrust applied by the engine on the car is <br>
Question 12 :
If a particle of $1Kg$ at mars is pushed through a distance of $5m$. Calculate the total work done. (given $\mu_{m}=0.3$ and $g_{m}=5m/s^2$)
Question 14 :
A pump motor is used to deliver water at a certain rate from a given pipe. To obtain 'n' times water from the same pipe at the same time, by what amount the power of the motor should be increased?
Question 16 :
A ball is dropped from a height of 20 cm. Ball rebounds to a height of 10 cm. What is the loss of energy?
Question 19 :
A sphere collides with another sphere of identical mass. After collision, the two spheres move. The collision is inelastic. Then the angle between the directions of the two spheres is
Question 20 :
A body of mass 100g is rotating in a circular path of radius 'r' with constant speed.The work done in one complete revolution is:
Question 23 :
If the momentum of a body is increased by 100%, then the percentage increase in the kinetic energy is
Question 24 :
If the heart pushes 1 cc of blood in one second under pressure 20000 $N/m^2$ the power of heart is:
Question 25 :
Two bodies moving towards each other collide and move away in opposite directions. There is some rise in temperature of bodies because a part of the kinetic energy is converted into
