shows a small heavy box of emergency supplies is dropped from a moving helicopter at point A as it flies along in a horizontal direction. Which path in the drawing below best describes the path of the box (neglecting air resistance) as seen by a person standing on the ground and explain the physics' concept that involve in this situation. (10 marks) th Figure 1 Example how to write the answer Concept The physics concept that involve in this situation is projectile motion Explanation Projectile motion we can describe as taking place in two dimension. It trajectory is parabolic path it could be understood by analyzing the horizontal and vertical components of the motion separately The velocity vector at each instant points in the direction of the ball's motion at that instant and is always tangent to the path. Following Galileo's ideas, we treat the horizontal and vertical components of the velocity, and separately, and we can apply the kinematic equations to the x and y components of the motion In the horizontal direction, the acceleration is zero we are gnoring air resistance). With the horizontal component of velocity, remains constant, equal to its initial value and thus as the same. Then the acceleration of the object is that due to gravity, which acts downward with magnitude 9.87m/s and we assume it is constant magnitude at each point on the path and velocity along vertica component is increase continually in downward direction Formula/ mathematical concept The general formula that use in this concept are Shut-1/28 V- Vol-2 Example A golf ball a thrown or batted baseball, kicked footballs, and speeding bullets
