1. If an object of mass 9 kg starts from rest and attains a velocity of 15 m/s after 5 s, then the force acting on it is   3 N   45 N   75 N   27 N   Hint Half-n-half Clue   2. An object is moving in a circular path. The force acting on the object towards the center of the circle is called the   magnetic force   centrifugal force   gravitational force   centripetal force   Half-n-half Clue   3. The gravitational force acting on an object is called its   density   weight   momentum   mass   Half-n-half Clue   4. The approximate weight (on Earth) of a mass of 2 kg is   0.2 N   200 N   2000 N   20 N   Half-n-half Clue   5. When a force of 30 N acts on a body of mass 10 kg, the body will accelerate at   None of these   3 m/s2   300 m/s2   30 m/s2   Half-n-half Clue   6. A mass of 9 kg moves at 5 m/s. Its momentum is   45 kg m/s2   45 N s   90 kg m/s2   90 N s   Half-n-half Clue   7. "A body continues in its state of rest or uniform motion in a straight line unless acted upon by a force" is a statement of   Newton's third law of motion   Newton's law of gravitation   Newton's first law of motion   Newton's second law of motion   Half-n-half Clue