4 When a boxer gets hit on the face by his or her opponent, he * 2 points or she should move back his or her head with the same direction as the punch. Why is that so? O Moving back his or head will create more impact time, therefore, lesser impact force on his or her face. O Moving back his or head will create less impact time, therefore, lesser impact force on his or her face. O Moving back his or head will create less mass, therefore, lesser impact force on his or her face. O Moving back his or head will create more mass, therefore, lesser impact force on his or her face A 0.25-kg tennis ball is thrown to the right with an initial * 1 point velocity of 10 m/s. The ball hits a racket and is reflected with the same speed but in the opposite direction. Compute for the value of its change in momentum. O O kg m/s O - 5 kg m/s O -10 kg m/s O -20 kg m/s O Correct answer not found A 3.9kg object's center of mass is moving at a speed of * 1 point 5.6m/s. What is its momentum? 13.55 kg m/s O 21.84 kg m/s 82.14 kg m/s O 122.304 kg m/s Which is TRUE about elastic and inelastic collisions? * 1 point O KE and momentum are conserved in both elastic and inelastic collision. O KE is conserved on both but momentum is not conserved in inelastic collision. KE and momentum is not conserved in inelastic collision while O there is no transformation of energy and change in momentum in elastic collision. KE and momentum is conserved in inelastic collision while there O is a transformation of energy and change in momentum in elastic collision