question_answer

             The velocity-time graph of an object of mass m = 50 g is shown in figure. Observe the graph carefully and answer the following questions. (a) Calculate the force on the    object in time interval 0 to 3 s.      (b) Calculate the force on the object in the time interval 6 to 10 s.                         (c) Is there any time interval in which no force acts on the object? Justify your answer.

Answer:

                  (a) Acceleration during interval 0 to 3 s Given mass, Force, (b) Acceleration during interval 6 to 10 s Force, (c) During time interval 3 to 6 s, the velocity of object is constant, so in this time interval, acceleration is zero and hence force, F (= ma) is zero.]