Chapter 3|Conceptual Questions|Physics Class 11|KPK text Book|Federal Board| New Syllabus|

Chapter 3, Motion and Force Physics Class 11 Conceptual Questions KPK text Book Federal Board 1) If you are riding on a train that speeds past another train moving in the same direction on an adjacent track. It appears that the other train moving backward. Why? 2) Can velocity of a body reverse its direction when acceleration is constant? If you think so, give an example. 3) When you stand still on the ground, how large a force does the ground exert on you? Why doesn’t this force make you rise up into the air? 4) A man standing on the top of a tower throws a ball vertically up with certain velocity. He also throws another ball vertically down with the same speed. Neglecting the air resistance, which ball will hit the ground with higher speed? 5) The cricket coach explains that the follow through with the shot will make the ball travel a greater distance. Explain the reasoning in term of impulse-momentum theorem. 6) When you release an inflated but an untied balloon, why does it fly across the room? 7) Modern cars are not rigid but are designed to have ‘crumple zones’ (irregular fold) that collapse on impact. What is the advantage of this new design? 8) Why we can hit a long sixer in a cricket match rather than if we toss a ball for ourselves? 9) An aero plane while travelling horizontally, dropped a bomb when it was exactly above the target, the bomb missed the target. Explain. 10) Calculate the angle of projection of a projectile for which Kinetic Energy at the Summit is equal to one fourth of its Kinetic energy at point of Projection. 11) Show that for any angle of projection of a projectile, the maximum range is equal to four times of the corresponding height. 12) What is the angle for which the maximum height and corresponding range are equal?.