 Test Series-21

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.Action and reaction are equal and opposite and they act on:?
• Same body
• different bodies
• None of these

An object of mass 200kg is accelerated uniformly from a velocity of 4m/s to 8m/s in 2 seconds.
2) What is the formula for Impulse
• Impulse=change in Momentum
• Impluse=Force exerted
• Impulse=mass X velocity
• None of these

3. What is the final momentum of the object?
• 400 kgm/s
• 800kgm/s
• 1600 kgm/s
• none of these

4.find the magnitude of the force exerted on the object?
• 800N
• 100N
• 200N
• 400 N

5.Which one of these is not vector quantity?
• Impulse
• Momentun
• Force
• None of these

6. A force of 50 N acts on a mass of 500g resting on a frictionless surface. What is the acceleration produced??
• 5 m/s2
• 25 m/s2
• 100 m/s2
• 10 m/s2

7. A object of mass 5 g is pushed on a table. The object starts moving at a speed of 15 m/s and stops in 5 seconds. Find the force of friction exerted by the table on the object.?
• .01N
• .012N
• .115N
• .015N

8. There are two statements A Rate of change of momentum corresponds to force B Rate of change of momentum corresponds to Kinetic Energy Which one of the following is correct?
• A only
• B only
• Both A and B are correct
• Both A and B are wrong

9.which one of these is not a correct formula?
• Force=ma2
• Impulse=change in momentum
• Force=ma
• P(momemtum)=mv

10.The inertia of an object tends to cause the object?
• to decelerate due to friction
• to resist any change in its state of motion
• to increase the speed
• None of these

11. The change in momentum of a body in 0.02 sec is 10kg m/s. Find the force acting on this body?
• 5000N
• 10N
• 1000N
• 500N

12. A truck of mass 100 kg starts at rest and moves in a straight road with constant accleration 5m/s2 .What is the momentum after 5 sec?
• 2500Kgm/
• 250kgm/s
• 500kgm/s
• none of these