A softball of mass 0.3 kg strikes a hard wall perpendicularly with an initial speed of 35 m/s. The softball is in contact with the wall for 0.03 seconds, and then rebounds straight back with a speed of -15 m/s. What average force was applied to the softballby the wall? ​

Avoltage source vs = 10 v is in series with a resistor of 10 kohm. if the source transformation theorem is applied, what will the value of the current source be in ma ?

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.