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SAI INTERNATIONAL SCHOOL


                                                       CLASS-IV

                                                  SUBJECT - SCIENCE


                                     CHAPTER 10-FORCE, WORK AND ENERGY

               SUB TOPIC- TYPES OF FORCES (GRAVITATIONAL AND FRICTIONAL FORCE) AND WORK

               Objective Questions:

               1. Fill in the blanks:

                   a)  A ball thrown in the sky falls back on the earth due to_____________.

                   b)  A ball rolling on a surface comes to rest on its own due to___________.
                   c)  ____________force  is also known as force of resistance.
                   d)  Smoother surface cause less ____________.
                   e)  Rough surface cause ___________  friction.


               Subjective Questions:

               2. a) Why do we slip on wet tile or wet
               granite floor?


                   b) Which type of force is acting here?





                 3. a) Why leaves are falling on the ground?

                    b) Which type of force is acting on

                   leaves?
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