Question

a 145g baseball approaches the bat at 32.3m/s. the batter imparts a 12.0 kg*m/s impulse in the opposite direction. (b) if contact time was 1.10ms, what was the average force applied by the bat?

Answer 1

i found the first part by using I=m(Vfinal-Vintial). but the second part is kind of confusing to me. what does the unit ms stand for?

Answer 2

ms is a unit of time: milliseconds. I.e., 1 ms = 0.001 of a second.