Test Series-19

## Instructions

• Your test contains 12 multiple choice questions with only one answer
• This is 30 min test.Please make sure you complete it in stipulated time
• You can Finish this test any time using 'Submit' button.
• Once finished you get a chance to review all question with correct answers and their solutions.

1.Which of the following does not have unit as Joule?
• Workdone
• Kinetic energy
• Potential energy
• Heat
• Force

A truck driver pushes the acceleration peddle and increase it speed from v to 2v on the level Road. The mass of the Truck is M.
2) The potential energy of the truck?
• does not change
• PE of the truck becomes four times of the initial Potential energy
• None of these

3. What is the Final KE of the truck
• 4Mv2
• Mv2
• .5Mv2
• 2Mv2

4.Workdone by the acceleration peddle ?
• 1.5Mv2
• Mv2
• .5Mv2
• 2Mv2

5.Two bodies X and Y have same momentum. Mass of X is greater then mass of Y. Which of the two bodies will have higher kinetic energy?
• X
• Y
• Both will have same KE

6. A force of 50N on a body causes a displacement 20 m in the direction of the force.What is the workdone by the force?
• 100J
• 1000J
• 2.5J
• None of these

7. An object is falling freely from the height H.After it has fallen a height 3H/4,it will possess?
• more potential and less kinetic energy
• less potential and high kinetic energy
• same potential and kinetic energy
• only kinetic energy

8. A pump takes 20 sec to lift 100 kg of water to the water tank situated at the height 10 m. What is the power of the pump? Given g=10m/s-2
• 2 Kilowatt
• 1 kilowatt
• 1.5 kilowatt
• .5 kilowatt

9.Find the momentum of the body of mass 10 kg having a kinetic energy 20J?
• 10 kgm/s
• 20 kgm/s
• 1.44 kgm/s
• None of these

10.Which of the following is false?
• A running car possess Kinetic energy
• A compressed spring possess elastic potential energy
• A stone kept on the roof top posses gravitational potential energy
• None of these

11. which of these is not a vector quantity?
• Potential energy
• Momentum
• Force
• Velocity

12. A man of 50 kg jumps up to a height of 1.2 m. What is his potential energy at the highest point?
• 50J
• 60J
• 500J
• 600J