Plz help me guys there’s 3 answers

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

Which atomic model was proposed as a result of j. j. thomson’s work?