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SAI International School
                                                     Class VII
                                              Home Assignment
                                               Subject: Physics
                                             Ch-Time and Motion
                                        Subtopic: Motion and Speed

         Fill in the blanks
            1.    Instrument to know the speed of the vehicle is __________.                               1
            2.    Instrument to know the distance travelled by the vehicle is ____________.                1
            3.    Change in position with respect to surroundings is known as __________.                  1
         True or False
            4.    We can find speed of a moving object if we know the mass and distance travelled          1
                 by it.
            5.    Speed of bike moving in traffic always remains constant.                                 1
         MCQ
            6.    SI unit of speed is                                                                      1
                 a)  Km/h
                 b)  m/s
                 c)  Miles/h
                 d)  Km/s
            7.    100 m/s will be ____ km/h                                                                1
                 a)  100 km/h
                 b)  18/5 km/h
                 c)  360 km/h
                 d)  1800 km/h
            8.    To convert m/s into km/h,
                     a)  We multiply the speed with3600/1000.                                              1
                     b)  We multiply the speed with 18/5.
                     c)  We multiply the speed with 3.6.
                     d)  All of the above
            9.    Which of the following statement is incorrect?                                           1
                     a)  Fast motion covers more distance in given specified time.
                     b)  Slow motion takes more time to cover certain specified distance.
                     c)  Speed is the distance covered by a body per unit second only.
                     d)  Motion and rest are relative terms.
         Subjective Questions
            10.   In a 400 m race, an athlete takes 80 s to run the distance. Find his speed.              2

            11.   A bus travelled a distance of 480 km in 8 hours and a train covered a distance of        2
                 1200 km in 10 hours. Which one of the two travels faster- car or train?

            12.   Convert 54 km/hr to m/s.                                                                 2
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