Mrs. newman’s class decides to perform an experiment during a class connect session to determine how long it takes different objects to hit the floor when dropped from the student’s desk. each student dropped three notebooks, one weighing 0.5 pound, one weighing 1.0 pound, and one weighing 2.5 pounds. what would you predict about the times it took for each of them to hit the floor? a) the 0.5lb notebook would hit the floor first b) the 0.5lb notebook would hit the floor last c) the 2.5lb notebook would hit the floor first d) all notebooks would fall at the same time e) all notebooks would remain suspended in the air

From 0 to 5 seconds john pushed a box 5 meters. from 5 to 10 seconds, paul pushed the same box another 5 meters. who did more work? a. john b. paul c. john and paul did the same amount of work.

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has mass of 0.15 kg?