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SAI INTERNATIONAL SCHOOL
                                                       PHYSICS

                                                       CLASS IX
                                     PHYSICS HOME ASSIGNMENT-20

               OBJECTIVE
               MCQ (BOARD)


               1. SI unit of work is
               a.  newton.

               b.  joule.

               c.  pascal.
               d.  dyne.

               2. The relation that describes work done is

               a.  work done = Force/displacement.
               b.  work done = Force x time.

               c.  work done = Force x displacement.

               d.  work done = displacement/Force.
               3. When a porter carries luggage on his head, work done by him is

               a.  positive.

               b.  negative.
               c.  zero.

               d.  non-zero.

               4. A coolie carries a load of 500 N to a distance of 100 m. The work done by him is
               a.  5 N

               b.  zero

               c.  15 N
               d.  50 N

               5. The work done by the gravity on a body moving upward is

               a.  not dependent on the weight of the body.
               b.  zero.

               c.  negative.



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