\fA photo port is used to measure the speed of a small sphere in free fall. The photo gate consists of two sensors (the gray rectangles in the figure} that detect when the sphere passes them (cross the horizontal dotted lines at heights A and C]. The photo ports are located with the vertical distance, 153/, from each other. It is measured that the time, At, passes from the time the ball passes the first sensor and until it passes the other sensor. The measured speed is Ayfm. Which of the following equations are relevant to describe the movement of the pendulum? A) Newton's lst Law B) Archimedes' law, C] Kinematic equations for motion with constant acceleration D) Mechanical energy conservation ofthe sphere E} Newton's 3rd Law F] Impulse torque conservation for the ball, dedt=O G) Equation for fluid friction, ff 2 kkw\" H} The pulse moment theorem for the pendulum, H22 : 1111 I) Bernoulli's equation, 2 ppr + pppph + pp = constant J) The parallel axis theorem, K) Do not know O Et pendul bestaende af en metalkugle med radius R og massen M ophaengt i en snor af laengden / svinger nedsaenket i vand som vist pa figuren. Kuglens massefylde er storre end vandets. I det viste ojebliksbillede er pendulet i den nedadgaende del af bevaegelsen. Hvilke af kraefterne indtegnet i nedenstaende diagram virker pa metalkuglen? R