A softball pitch comes at the batter at +50m/s. The batter swings with a force of 1800 N and sends the softball away at -70 m/s. How long
did the contact between the 0.3 kg ball and the bat last

You throw a baseball directly upward at time t = 0 at an initial speed of 12.3 m/s. what is the maximum height the ball reaches above where it leaves your hand? at what times does the ball pass through half the maximum height? ignore air resistance and take g = 9.80 m/s2.

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form