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phy practice mcqs.pdf - theonlinephysicstutor.com SL Paper...

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SL Paper 1MarkschemeExaminers reportMarkschemeTwo objects undergo an inelastic collision. Which of the following is correct in respect of both the conservation of momentum and the conservation oftotal energy of the system?BThis question refers to the total energy of the system. Many candidates answered as though it were referring only to the kinetic energy of the system.A gas atom strikes a wall with speedat an angleto the normal to the wall. The atom rebounds at the same speedand angle .Which of the following gives the magnitude of the momentum change of the gas atom?A. zeroB.C.D.Dtheonlinephysicstutor.com@TOPhysicsTutorfacebook.com/TheOnlinePhysicsTutor
Examiners reportMarkschemeA large majority of the candidates opted for A, indicating perhaps that they misunderstood the question as asking for thechange in the magnitude ofmomentums.It is worth noting that such an interpretation has no physical significance, whereas the question being asked relates to the force of theball on the wall.The initial kinetic energy of a block moving on a horizontal floor is 48 J. A constant frictional force acts on the block bringing it to rest over a distanceof 2 m. What is the frictional force on the block?theonlinephysicstutor.com
Examiners reportMarkschemeExaminers report[N/A]Objectsandcollide together. They end up joined together and stationary. During the collision, a forceis exerted on objectby object.According to Newton’s third law, there will also be a force ofA.acting on object.B.acting on object.C.acting on object.D.acting on object.A[N/A]@TOPhysicsTutorfacebook.com/TheOnlinePhysicsTutor
MarkschemeExaminers reportMarkschemeExaminers reportAn object falls from rest from a heighthclose to the surface of the Moon. The Moon has no atmosphere.When the object has fallen to heightabove the surface, what is?A.B.C.D.

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Term
Fall
Professor
Broadben
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